Students are exposed to simple machines and their uses. As such, these exercises are very functional. E4C is a dynamic community of engineers, technologists, social scientists, NGOs, local governments, and community advocates whose mission is to improve people’s lives in communities around the world. Physics in Everyday Life 1 Just about everything you do from moving to eating to listening to music involves physics. Most of this material is identical to material covered in EN030, and is provided here as a review. The Importance of Gears in Everyday Products and Processes. By looping more ropes around more pulleys we can construct a block and tackle to continue to increase the mechanical advantage. The broom is a lever. Axle and sheave are removable. Ultimately, the goal of cognitive training is to enhance or sustain cognitive abilities at healthy levels for longer portions of the life span in the hope that everyday functioning will benefit. Another example is when trying to understand the relations and mechanics inside of a car, they are relying on their spatial perception to understand its visual framework. A knife is also a wedge, and sharper knives slice food with less effort. 3 Parallelogram mechanism. CMC Equipment, committed to providing pulleys for use with rope rigging equipment, pulley systems, swivels, carabiners, and training gear for search & rescue organizations and departments. The Pulley & What Gears Do - Grade 4 Author: Brittany Walker Created Date: 20140610045300Z. Village women feel much at ease as they draw water from the wells with the advantage of the pulley. A catastrophe may be thought of as Fig. What are pulleys? : by Helen Frost, Capstone Press, 2001. Read More. For example, in solving the pulley problem shown in Fig. When used vertically it would be a 4:1. Simple machine, any of several devices with few or no moving parts that are used to modify motion and force in order to perform work. They are open belt drive and crossed belt drive. In the Simple Machines module, students see examples of how simple machines can make work easier by reducing the force needed to move an object over a distance. There are three types of levers: first class, second class, and third class. Appilication of liquid pressure in daily life 5 examples - 124412 The liquid pressure is used in following ways 1. Listen to Christian radio ministry broadcasts, programs, and sermons from pastors, speakers like John MacArthur, Adrian Rogers, Beth Moore, David Jeremiah. BodyCraft Strength Training System Exercise Guide. , pulley hoist system, such as window blinds). a) types of simple machines (lever, screw, pulley, wheel and axle, inclined plane, and wedge); d)examples of simple and compound machines found in the school, home, and work environment. Discuss with students that simple machines are all around us. There are several examples of movable pulleys that appear frequently in everyday life including: Bike hoist pulleys are often used in conjunction with fixed pulleys that are attached to the roof Construction cranes combine movable pulleys with powerful machinery to move huge loads safely. Lever is a type of simple machine that is used to lift the heavy loads. The hook could be changed for other “useful” attachments. The first pulley is considered a driver pulley. What happens when unbalanced forces act on an object? Give an everyday example. Some examples of pulleys include cranes, flag poles, and window blinds. The wheel and axle are one of the oldest, simple machines around. One unique aspect of a movable pulley is that it only has one part that is attached to a fixed object, usually either a beam or a bar. Anywhere that electrical power is required to achieve a small movement becomes an application for a solenoid. The pulley allows a person to change the direction of the force, but the force delivered by the pulley, the output force, is the same as the applied force or input force. A water wheel is a perfect example of a bevel gear. Nothing embodies everyday engineering like simple machines—the basic mechanical devices used for thousands of years that we rely on more than we may realize. You apply force at the other end and the force you produce is in the middle. a girl eats a sandwich _____ 10. In everyday life, there are so many examples of these simple, yet useful machines. A 24-page guide that introduces pulleys and shows how we use them in all kinds of ways in everyday life. You feel half the weight of the mass as you pull, since. Washing clothes is not a difficult task now owing to embedded systems. Many bottles and jars have screw on lids. Examples of pulleys in everyday life A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. Elevators work via a powerful electronic pulley system. As a result, you would go bouncing down the field. Examples include cranes, elevators and construction hoists. Tie a simple overhand knot to secure the loop in the end of the rope or cord. Discuss with students that simple machines are all around us. But when you take some times to look for pulleys you will find a lot of different models and size. They are the elementary "building blocks" of all the complicated machines (sometimes called "compound machines" to emphasize that they are combinations of the simpler building blocks). Referring back to some of the things mentioned above and taking the pulley as an example, a pulley is used in most everyday machinery in order to reduce the amount of force needed to do work. Simple machines are devices that can make a tough job easier by enabling a person to apply less force or to apply force in a direction that is easier to manipulate. Movement of our arm is an example of third class lever where the effort is applied in between the fulcrum and load. A broom is used to help make it easier to clean. One example of a simple machine in everyday life is a broom. We can apply a pull while opening the door of our room. pulley examples in everyday life - lesateliersdesylvieeu. ! Playing With Pulleys:! 1. Appilication of liquid pressure in daily life 5 examples - 124412 The liquid pressure is used in following ways 1. A compound machine is a device that combines two or more simple machines. An electric motor pulls the cable, lifting the car between floors. The emphasis here is on pulleys as a means of using forces to our advantage. Examples of Simple Machines used in everyday life Lever Inclined Plane Pulley Wedge Screw Wheel Axle If you start looking around you will find these simple machines in your everyday life. While in everyday life, the term catastrophe has a negative connotation, it can be used for many useful applications. machine does for you. Examples of pulleys in everyday life Elevators. Here are a few examples of what the different classes of levers might look like in your everyday life! Here are a few examples of what the different classes of levers might look like in your. For example, 2 of these pulleys from Carolina Biological. , pulley hoist system, such as window blinds). Image of force in our everyday life. Ten of these machines filled with up to 2500 vacuum tubes, pulleys, and rolls of punched paper tape lined up in a field helped reduce the length of the war. Draw three examples of levers that are used in everyday life. For example, wheels, levers, and pulleys are all used in the mechanism of a bicycle. Wheels and axles are used to carry loads around easily, for long distances with very less effort. In this lesson, learn about the similarities and differences between wedges. Another use of the pulley is with a flat wheel and belts. Levers A lever is a simple machine that consists of a rigid bar supported at one point, known as the fulcrum. Pushing down on one end of a lever results in the upward motion of the opposite end of the fulcrum. They are used to play different melodies for you,friends,and family. We’ve developed a CPD session which works through our ideas, and you are welcome to make use of the resources from the session. Activities should focus on identifying the six simple machines, explaining how they operate, and locating examples in everyday life that make a task easier at home, in school, and in the workplace. Levers all pivot around a fixed point called a fulcrum. Double the rope or cord several inches from the end to form a working loop. Examples of pulleys in everyday life | pulley simple machine. what are some everyday examples of Gears? I want to know some everyday examples of gears for a science project. pulley examples in everyday life - biosantebe. Examples and Everyday Uses of Pulleys August 17, 2018 Posted in Uncategorized Written by teamrabbit Leave a comment A pulley is a simple yet powerful device that uses a tracked wheel and rope, cord, or chain to increase lift strength. Next, they will be shown how the musculoskeletal system is a system of levers and one example of each type of lever. The single fixed pulley is installed on the hoist (device). by Ron Kurtus (revised 26 July 2016) A lever is a simple machine that allows you to gain a mechanical advantage in moving an object or in applying a force to an object. The cable is wrapped around a groove in the wheel and axle. Fundamentally, a Van de Graaff generator consists of a flexible dielectric belt (silk is commonly used) running over two metal pulleys. Google them or google “simple machines” to learn more. Trust is the glue that holds these “nests” together. Human Health 1. Scissors, brakes, pulley, gears, inclined plane, screw etc. The first image of a pulley is from a battle scene in ancient Assyria in the 8th century BC. We use these machines daily. A pulley makes work easier by changing the direction or direction and size of the force. Students are given the opportunity to use hands-on techniques to explore. Comprised of a series of adjustable weights, pulleys, and levers, a weight machine will guide your body through a basic movement, while still making you do enough work to get good results. Next, they will be shown how the musculoskeletal system is a system of levers and one example of each type of lever. These everyday definitions generally have to do with making someone or something behave in a certain way. There are also two other types of pulleys: A moveable pulley and a compound pulley. Turning a doorknob helps us move a door latch easily, so that we can open and close. How do simple machines make life easier for us? *Essential Vocabulary listed in the GPS Standards **Supplemental Vocabulary listed in the state frameworks and/or other state document Essential* Screw Pulley Lever Wedge Work Inclined plane. “Often care of the soul means not taking sides when there is a conflict at a deep level. lever, the pulley, the wheel and axle, the incline, the wedge, and the screw. Epiphanic moments are not restricted to literature. This will help your child to distinguish between the various types of angles. Learn how to do just about everything at eHow. An example is shown in Figure 3. Using the Project Approach with Toddlers. Examples include wheelbarrows, staplers, bottle openers, nut cracker, and nail clippers. It uses the principle of applying force over a longer distance, and also the tension in the rope or cable, to reduce the magnitude of the necessary force. What do children learn about forces in primary school? Children in primary-school learn that a force is a push or a pull. Using syringes, tubing devices, and examples of hydraulic and pneumatic systems to illustrate various concepts in relation to fluids. Find a picture of these examples of the inclined plane: Handicapped ramp Slide at playground Loading ramp. They are open belt drive and crossed belt drive. What you’ll want to add to your core routine are more twists and turns that mimic the functional movements of everyday life. We shall be using them in an activity. These machines are made up of several simple machines and. This is quite strenuous and if the user manages to reach the target height, a bell rings. In everyday life, there are so many examples of these simple, yet useful machines. The blinds of a curtain are moved with the help of a pulley. pulley examples. A compound machine is a device that combines two or more simple machines. A block and tackle is an arrangement that uses multiple pulleys mounted on the same axle. Worksheets about levers. a light switch Pulleys e. In the first class lever, fulcrum lies between effort and the load. Such a device is shown in Fig. There are three messages about the role of spatial thinking in everyday life, at work, and in science. What are the three classes of levers? A class 3 lever does not have the mechanical advantage of class -one levers and class -two levers , so examples are less common. Ideal Mechanical Advantage In real life, some of the work done by the input force is converted. The pivot is 0. a pulley b. The pulley is a simple machine made with a wheel and a rope, cord, or chain. com offers 1,309 bathroom pulleys products. Examples of class 2 levers include catapults, screwdrivers, nutcrackers, staplers, and wheelbarrows. Let the number of organisms at any time t be x(t). Pulleys are simple machines that make daily life so easy. Simple machines: pulley tutorial | sophia learning. Using the simple machines powerpoint included below, introduce the definitions of the six simple machines and talk about the pictures that show how simple machines are used in puppetry and everyday life. PMO3: Use simple machines to make work easier. They can also be used to provide power from one shaft to another. A complex machine consists of more than one simple machine. Anywhere that electrical power is required to achieve a small movement becomes an application for a solenoid. The daily life of the ancient Mesopotamians was not so different from the lives of those who live in that area today. Get an answer for 'What are some examples of compound machines in daily living?' and find homework help for other Science questions at eNotes. Now that I have really explored them I think it is hard to go about our day and not do something that involves physics. The first image of a pulley is from a battle scene in ancient Assyria in the 8th century BC. Examples of Screws: Some screws have a sharp point and are mostly used on wood. Epiphanic moments are not restricted to literature. Wedges and screws. Neglecting the sagging of belt. How to make a Pulley? Learn how simple physics helps make everyday life easier. Advances in medicine and other fields are made using microscopes and other technological equipment. machine does for you. Denver d12 laboratory flotation machine by skdthe denver model d12 laboratory flotation machine is the world leader in froth flotation laboratory testingt has a suspended type flotation mechanism for raising and low. Anything that is used to lift something up can be seen as a lever. Then, students use interactive activities to experiment with these simple machines: lever, pulley, wheel and axle, wedge, screw, and inclined plane. If there’s enough inflammation, nociceptors are triggered. Many bottles and jars have screw on lids. The Oxford Book of English Verse: 1250–1900. let’s look at some places we use pulleys. Inflammation ensues. There are three classes of lever and each class has fulcrum, load and effort which together can move a heavy weight. 7 Everyday Objects With Brilliant and Simple Designs Here are seven examples of objects that aren't particularly sophisticated but but have a subtle, genius simplicity to their design. Find (a) the tension in each section of rope, T 1, T 2, T 3, T 4, and T 5 and (b) the magnitude of F. What you’ll want to add to your core routine are more twists and turns that mimic the functional movements of everyday life. one pulley attached to structure; force is redirected; no mechanical advantage; Moveable Pulley. The pulley is one of the six simple machines. Several pulleys can be used at one time. How do simple machines make life easier for us? *Essential Vocabulary listed in the GPS Standards **Supplemental Vocabulary listed in the state frameworks and/or other state document Essential* Screw Pulley Lever Wedge Work Inclined plane. You can also choose from stainless steel, nylon. Appilication of liquid pressure in daily life 5 examples - 124412 The liquid pressure is used in following ways 1. What is a pulley? A pulley is a simple machine in which a rope is passed over the top of a wheel. There are 1,338 bathroom pulleys suppliers, mainly located in Asia. Ideal Mechanical Advantage In real life, some of the work done by the input force is converted. This included thinking about how we could use a coat hanger catapult to help the Gingerbread man across the river and how to get tomatoes down a hillside in Nepal using pulleys. For example, a lever is an example of this phenomenon: In this diagram a force F is being applied to the left end of the lever. 5–6 : Answers in Genesis • Explain why it is necessary to look at the world with a biblical perspective • Explain from the Bible the sources of food for both people and animals before. There are three types of levers: first class, second class, and third class. " These two types can be combined to create a more complex pulley system. Examples are ramps, sloping roads, chisels, hatchets, plows, air hammers, carpenter's planes and wedges. Free Play: Our toy garage has inclined planes (ramps) to drive cars up and down, and an elevator on a pulley (two simple machines in one toy). asked by srinivasan on July 26, 2015; AQA Mechanics (M1), Statics and forces,please help. what are some everyday examples of Gears? I want to know some everyday examples of gears for a science project. Worm Gears Spur Gears We can find spur gears in music boxes. The scientific. The key point of pulleys is that they redirect force. Discover how simple machines work. An example EV3 crane In this series of challenges, students will design and build motorized crane that uses a pulley and a string to lift and lower heavy objects. Epiphanic moments are not restricted to literature. For example, a lever is an example of this phenomenon: In this diagram a force F is being applied to the left end of the lever. Examples in our everyday world include blinds, garage doors, and even a flagpole. have an element of challenge and self expression. Examples of fixed pulleys include flagpoles or miniblinds. • Describe the general function or tool made from each of the different types of simple machines. Solution By using SuperTLink SP Wedge Belts to replace the rubber belts, installation time was cut to a couple of hours. You only start to feel an ache after you finish the route, though damage would have occurred with the pop instantaneously. Experiment 1 - What to do • Connect the rope to ring A on the arm • Using the hook on the fishing scale, pull on the other end of the rope to flex the "elbow" until it is. Five everyday problems that bother me are : Getting up early in the morning for school, coming back home having my room a mess cause of my sister, my sister asking me for something, having homework over the weekend, starting the week off with going to school and having a bad Monday. These everyday definitions generally have to do with making someone or something behave in a certain way. Life would be difficult without simple machines. KEY QUESTION How do pulleys make work easier? TEACHER BACKGROUND A pulley is a wheel which is a grooved edge. Key Words Pulley system, Inclined plane, Combined pulley, Fixed pulley, Movable pulley Summary The students will learn about the advantages of using inclined planes and pulleys through investigation. let’s look at some places we use pulleys. Physics in Everyday Life 1 Just about everything you do from moving to eating to listening to music involves physics. They will then apply what they have learned to solve a problem using the engineering design process. 2 The student will investigate and understand simple machines and their uses. At building construction sites, cranes use pulleys to lift. Playground/building site/fishing trip - real life examples of pulleys; Reenactment of Egyptian life (HOTP) Literacy links. For example, when you’re doing a crunch and you move back and up or down and forward. Using syringes, tubing devices, and examples of hydraulic and pneumatic systems to illustrate various concepts in relation to fluids. Tie a simple overhand knot to secure the loop in the end of the rope or cord. Examples of Pulleys in Everyday Life Elevators. Rube Goldberg Machines - a simple machines PowerPoint show by Matt Aufman and Steve Case, University of Mississippi [23 slides] Simple Machines game from Harcourt School. From power racks, rigs, and barbells to shoes, apparel & accessories, our online store equips garage gyms, military, pros & more. I intend to start by checking for background knowledge regarding the children's own interpretation of the machines we use. This is an important machine even today, as it helps people in everyday life, although the versions we now use are much more complicated. Two teams of the players are pulling the rope in the game of tug of war. The pulley multiplies the applied force by the mechanical advantage of the pulley. I would prefer that the tension of the belt be supported by a bearing, so I am wondering if replacing the pulleys with larger 608s would be ok, or if idler ODs need to match the pulley ODs. In ancient Egypt, winches, pulleys, blocks or tackle have not been applied in civil engineering enterprise. A simple machine. How to choose your Pulleys for your 3D printer. A 4:1 is commonly used attached to the end of a high-point. A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. Clarifying and consolidating ideas for communication to others. Pulley Examples In Everyday Life Oman. Causes, transmission, and prevention of, and resistance to diseases:. In reality, these things are really just a collection of billions of molecules and atoms that are the building blocks of life. We also had two wedge shaped mats and one triangle mat. A compound machine is a device that combines two or more simple machines. Example of a Machine. Friction affects the mechanical advantage you get from using different simple machines to do the same job. When we spray deo or paint through a bottle. One poster show 6 different types of simple machine and the remaining 6 posters show 6 examples for each type of machine - wheel, lever, wedge, screw, slope (inclined plane) and pulley. Most weightlifting exercise machines make use of pulleys as a way to. A rope is fitted in the grove and is used to lift heavy objects. What Are the 6 Simple Machines? List of Examples of Pulleys in Our Daily Life. Compute the length of belt if both pulleys will rotate in the same direction. The obvious use of pulleys is on the front end of most auto and truck engines. The point of contact of the two inclined planes results in a sharp edge which can be used to cut and split objects and to hold them together. becoming a billionaire was never a motivating factor. Levers, pulleys and gears presentation. Wheels and axles are used to carry loads around easily, for long distances with very less effort. Examples of pulleys in everyday life A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. All serve the purpose(s) of either make work easier, make work faster, or change the direction of a force. Even though these pulleys do not exist, they are useful to enable learning about certain issues. A box on an inclined plane with a pulley Task number: 510 What time does it take a box with mass m 1 to go down a distance s on an inclined plane with a slope of angle α when the box is coupled by a rope and a pulley to a bucket with mass m 2 ?. * *Build a Pulley Want to build a pulley? Go to this website to learn not only how to build one, but which one to build for the particular task. Accelerometers belong to this class of sensors. 5 m long is laid across a pivot to form a simple lever. The Egyptian Pulley is a simple but true pulley - a lifting machine. The pulleys are massless and frictionless. A scrapbook of illustrated examples of things that are hard to use because they do not follow human factors principles. lever, the pulley, the wheel and axle, the incline, the wedge, and the screw. For example, the numerous multi-colored stained glass windows in the sanctuary acted as relief from and a contrast to the harsh and drab everyday life in tenement buildings and sweat shops; and the numerous Stars of David on the façade of the building and painted inside on the walls also act as symbols of religious freedom, because many of the. A block and tackle is an arrangement that uses multiple pulleys mounted on the same axle. Meaning, they mimic real world. This included thinking about how we could use a coat hanger catapult to help the Gingerbread man across the river and how to get tomatoes down a hillside in Nepal using pulleys. Students explore different types of simple machines and research the concepts of force, effort, and work. However, to cement your learning, and see theory in practice, nothing beats some good ol' fashioned examples. The Importance of Gears in Everyday Products and Processes. Pulleys All Around Us Pulleys are all around. The Pulley & What Gears Do - Grade 4 Author: Brittany Walker Created Date: 20140610045300Z. Worksheets about levers. Motion on an inclined plane is a standard physics example. lever, the pulley, the wheel and axle, the incline, the wedge, and the screw. The Many Uses of extrapolate. The origin is not quite known but some historians believe that Mesopotamians used this simple machine to life water as long ago as 1500 BF. Some simple machines are a wheel, a pulley, a lever, a screw, and an inclined plane. As discussed in How Gear Ratios Work, you can create a high-ratio gear train that causes the drum to make perhaps one turn every six to 12 hours. In this everyday tools lesson, students watch a demonstration on how a lever, pulley, ramp, and wheel works. Students are exposed to simple machines and their uses. Real Life Math Problems. Accelerometers belong to this class of sensors. The students. Example 2: Refer the newton 2nd law of motion problems with solutions: A softball has a mass of 1. For example, when one is navigating through a dense forest they are using spatial perception and awareness. Worm Gears Spur Gears We can find spur gears in music boxes. It is made of two inclined planes and can move. The machine comes with a front lower cable attachment for leg extensions or stand up curls. A class 3 lever makes an object harder to move. Fixed Pulley Examples Everyday Life. Learn about pulleys with this interactive video lesson on pulleys, for kids. These simple machines have been around for thousands of years. They make lifting easier by changing a push upward to a pull downward. Some examples of pulleys in every day life are: A flag pole Washing machine conveyor belt in grocery line elevators and machines used in construction work. Basically, all that a pulley is is a wheel spinning around an axle to aid the motion of a belt. Friction affects the mechanical advantage you get from using different simple machines to do the same job. It’s also very opposite from the motions we perform in everyday life. What then are variables and how do you use variables in your study? I explain the … Continue reading What are Examples of Variables in Research? →. When the rope is pulled downward, the pulley turns and lifts the object. Examples of third-class levers in everyday life are hammers, tennis rackets, and fishing rods. Examples of transverse waves: electromagnetic radiation waves, ripples-waves on water, shaking a slinky spring or rope from side to side, earthquake waves of the S-waves type. The VoltageCurrent, Light and Temperature probes enable students to investigate quantitatively and measure the conversion of one form of energy into another. A knife, for example, is a type of machine. Experts write all our 2500 articles (and counting!), with full bibliography and citation information. But once you start thinking about them, it’s hard not to see them — everywhere, everyday! Above, Youngna used a screwdriver — a wheel and axle — to take apart bookshelves before moving. Can you think of other real life examples of rollers? Task: Please be sure to bring a box of pencil crayons to school tomorrow. Even though these pulleys do not exist, they are useful to enable learning about certain issues. Some examples of pulleys include cranes, flag poles, and window blinds. The Wheel and Axle and The Pulley Both these simple machines use round cylinders, but in different ways. by Ron Kurtus (revised 13 May 2019) There are three types or classes of levers, according to where the load and effort are located with respect to the fulcrum. With distance load to fulcrum 0. This machine was created to break the complicated Lorenz ciphers that the enemy had been using during the second World War. Each pulley has an oil impregnated bearing to extend pulley life. Pulleys are used in window blinds, on ships to raise and lower sails, elevators, exercise equipment,. The screwdriver is being used as a. What then are variables and how do you use variables in your study? I explain the … Continue reading What are Examples of Variables in Research? →. Fixed pulley synonyms, Fixed pulley pronunciation, Fixed pulley translation, English dictionary definition of Fixed pulley. Nylon Garage Door Roller (10-Pack) is the ultimate roller to quiet and prolong the life of your garage door. 5 m long is laid across a pivot to form a simple lever. Facts About Roman Houses and Life Perhaps the greatest of all the ancient civilisations, the Roman Empire represented the age of classical antiquity and helped create the world we live in today. The simple machines are the inclined plane, the lever, the wedge, the wheel and the axle, the pulley, and the screw. What are the three classes of levers? A class 3 lever does not have the mechanical advantage of class -one levers and class -two levers , so examples are less common. There are six types of Simple Machines; Lever, Inclined Plane, Pulley(s), Wedge, Wheel and Axle and the Screw. How do pulleys work? Explain that stuff. Each lever has an input force and an output force, but each lever has the input force and output force in a different place. The simple machines that make up everyday life is the simple lever, pulley, wheel and axle, simple inclined plane, wedge, and a screw. Every screw has two parts: a body or post around which the inclined plane is twisted, and the thread (the spiraled inclined plane itself). Give an example if needed. 2 The student will investigate and understand simple machines and their uses. This can be done with pulley and chain drives but gears have advantages over these system. Sharing a pride in a quality pulley, in value and workmanship, but above all, in service to both career and volunteer rope rescue professionals. pulley examples. If a pulley is movable it is "attached to a load that is being lifted. Examples of pulleys in everyday life | pulley simple machine. There are a lot of advantages for the wheel and axle and without this machine we would not be able to do some of the simple task we do throughout our everyday life. The left end of the lever is twice as long (2X) as the right end (X). Q: A mass M = 16 kg is held in place by an applied force F and a pulley system as shown in figure. Basically, all that a pulley is is a wheel spinning around an axle to aid the motion of a belt. • Due to time constraints, I was probably not able to show all the slides during class.