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Ch. 8 vocab.

QuestionAnswer
the transfer of energy to an object by using a force that causes the object to move in the direction of the force work
the unit used to express energy; equivalent to the amount of work done by a force of 1N acting through a distance of 1m in the direction of the force (symbol, J) joule
the rate at which work is done or energy is transformed power
the unit used to express power; equivalent to joules per second (symbol, W) watt
a device that helps do work by either overcoming a force or changing the direction of the applied force machine
the work done on a machine; the product of the input force and the distance through which the force is exerted work input
the work done by a machine; the product of the output force and the distance through which the force is exerted work output
a number that tells how many times a machine multiplies force mechanical advantage
a quantity, usually expressed as a percentages, that measured that ration of work output to work input; it can be calculated by dividing work output by work input mechanical efficiency
a simple machine that consists of a bar that pivots at a fixed point called a fulcrum fever
a simple machine that consists of a wheel over which a rope, chain, or wire passes pulley
a simple machine consisting of two circular objects of different size; the wheel is the larger of the two circular objects wheel and axle
a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp inclined plane
a simple machine that is made up of two inclined planes and that moves; often used for cutting wedge
a simple machine that consists of an inclined plane wrapped around a cylinder screw
a machine made of more than one simple machine compound machines
Created by: Jana12
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