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Simple Machines Foldable

Simple Machines Foldable. Pay attention. Simple Machines. Simple machines assist us in doing work by creating a mechanical advantage. They do not change the amount of work; they lower the effort force

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Simple Machines Foldable

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  1. Simple Machines Foldable Pay attention

  2. Simple Machines • Simple machines assist us in doing work by creating a mechanical advantage. • They do not change the amount of work; they lower the effort force • There are 6 types of simple machines: lever, inclined plane, pulley, wedge, screw, and wheel and axle. • Most machines are a combination of two or more simple machines.

  3. Inclined Plane • Inclined planes are ramps. • The length of the ramp is the effort distance (de), while the height of the ramp is the resistance distance (dr). • The weight of the object is the resistance force. • The force you apply is the effort force. • The length of the ramp is always greater than the height.

  4. Pulleys • Pulleys consist of a supporting cable and a rotating wheel. • Pulleys change the size, direction, or both of the input force. • An easy way to determine the mechanical advantage of a pulley is to count the number of strings supporting the weight. • The weight is the resistance force • The distance the weight is lifted is the resistance distance. • The actual distance you pull the cable is the effort distance.

  5. Levers • Levers consist of an arm that rotates around a fixed point known as the fulcrum. • There are 3 classes of levers. • The effort distance is measured from the fulcrum to where the effort force is applied. • The resistance distance is measured from the fulcrum to where the weight (resistance force) is located.

  6. MA Calculation Examples • A 600 N television is moved up a ramp. The ramp is 2.0 m high and 6.0m long. Find the mechanical advantage of the ramp.

  7. A 30 kg object is lifted by a system of pulleys. If 100 N of force is required to lift the object, then what is the mechanical advantage of the pulley system.

  8. A lever is used to lift a 40 N object. If you exert 10 N of force to accomplish this, what is the mechanical advantage of the lever?

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