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chapter 3

work and power

work the transfer of energy to an object by a force that makes an object move in the direction of the force. is only being done while the force is applied tto an object
power the rate at which work is done
mechanical advantage the ratio of a machine's output force produced to the input force applied
efficiency the ratio of the output work to the input work
simple machines do work using only one movement
lever a simple machine made up of a bar that pivots, or rotates, about a fixed point
fulcrum the point about which a lever pivots
wheel and axle an axle attached to the center of a wheel and both rotate together
inclined plane flat, sloped surface
wedge a sloped surface that moves
screw an inclined plane wrapped around a cylinder
pulley a simple machine that is a grooved wheel with a rope or a cable wrapped around it
Created by: booecam3836