Ch. 14 Vocab

is done when a force exerted on an object causes that object to move some distance; equal to force times distance; measured in joules.

rate at which work is done; equal to the work done divided by the tine it takes to do the work; measured in watts

force exerted on a macine

force exerted by a macine

number of times the input force is multiplied by a machine; equal to the output force divided by the input force

equals the output work divided by the input work; expressed as a percentage

a machine that does work with only one movement; includes the inclined plane, wedge, screw, lever, wheel and axle, and pulley

machine made up of a combination of two or more simple machines

simple machine that is a flat or sloped surface or ramp

simple machine consisting of an inclined plane that moves; can have one or two sloping sides

simple machine that is an inclined plane wrapped around a cylinder or post

simple machine consisting of a rigid rod or plank that pivots or rotates about a fixed point called the fulcrum

a simple machine made from two circular objects of different sizes that are attached and rotate together

a simple machine made from a grooved wheel with a rope or cable wrapped around the groove