Work, When an external force acts on an object and causes it to change distance or direction, Simple Machine, Basic devices with few or no moving parts that make work easier, Lever, A lever is a simple machine consisting of a beam pivoted at a fixed hinge, or fulcrum, Wheel and Axle, A simple machine consisting of a larger wheel (or disk) rigidly attached to a smaller cylindrical rod (the axle), Wedge, A triangular simple machine consisting of one or two inclined planes placed back-to-back, Power, The rate at which work is done over time, Mechanical Advantage, A measure of how much a simple machine multiplies your input force, making it easier to do work, Pulley, Uses a grooved wheel and a rope, cable, or chain to change the direction of a force, make lifting heavy objects easier, or transmit energy., Wedge (inclined plane), An inclined plane is stationary and helps you move heavy objects up a slope, whereas a wedge moves to drive heavy or thick objects, Screw, Consists of an inclined plane wrapped around a central cylinder
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Simple Machines
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Dtocci
Middle
Physical Science
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