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| -the product of the force applied on an object multiplied by the distance the object moved;W=Fxd |
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| the SI unit of energy; equal to 1 Newton-meter |
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| one- or two-part devices that make work easier: lever, wheel & axle, pulley, inclined plane, wedge, screw |
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| a rigid bar capable of turning about a fulcrum |
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| the fixed point about which a lever turns |
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| the method for computing the amount of force exerted by levers with unequal arms; w1d1=w2d2 |
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| the product of the force acting perpendicularly to a lever arm rotating around a fulcrum and the distance between the fulcrum and the point of application of the force |
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| a lever in which the fulcrum is located between the effort and the resistance |
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| force that must be applied to a simple machine to make it produce work |
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| distance from the fulcrum to the effort |
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| force against which a simple machine works; opposition to the flow of electrons |
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| distance from the fulcrum to the resistance |
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| Mechanical Advantage (M.A.) |
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Definition
| amount by which a machine magnifies effort(force) |
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| lever in which the resistance is located between the fulcrum and the effort |
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| lever in which the effort is applied between the fulcrum and the resistance |
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| modified lever in which the effort arm and the resistance arm revolve around a central fulcrum |
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| modified lever consisting of a rope that moves around a grooved wheel; can be movable or fixed |
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| arrangement of fixed and movable pulleys connected by ropes; has a high mechanical advantage |
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Definition
| says any reduction in the effort force will be paid for by an increased distance through which the force must act |
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| slanted surface used to raise objects |
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| two inclined planes placed back to back |
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| an inclined plane wound around a cylinder or cone |
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| distance between two adjacent threads |
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| approximating an answer when an extremely accurate one is not needed |
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Definition
| percent of work input returned as useful output |
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Definition
| amount of work done in a given period of time; P=W/t |
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| the SI unit of power; 1 Joule of energy per second |
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| What are some examples of 1st Class Levers? |
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Definition
| Teeter-Totter, Scissors, Crowbar |
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| What are some examples of 2nd Class Levers? |
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Definition
| Nut-Cracker, Door/Door Hinge, Wheelbarrow |
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| What are some examples of 3rd Class Levers? |
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