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chap. 5 vocab

brady bibbs

QuestionAnswer
machine device that makes doing work easier by increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied
input force force applied to the machine
output force force applied by the machine
mechanical advantage ration of the output force exerted by a machine to the input force applied to the machine
efficiency ratio of the output work done by the machine to the input work done on the machine expressed as a percentage
work the transfer of energy that occurs when a force makes an object move
power the amount of work done in one second- the rate at which work is done
simple machine a machine that does work with only one movement of the machine
lever a bar that is free to pivot or turn around a fixed point
pulley grooved wheel with a rope, chain, or cable running along the groove
wheel and axle simple machine consisting of a shaft or axle attached to the center of the larger wheel, so that the wheel and axle rotate together
inclined plane sloping surface such as a ramp that reduces the amount of force required to do work
screw inclined plane wrapped in a spiral around a cylindrical post
wedge an inclined plane with one or two sloping sides
compound machine two or more simple machines that operate together
Created by: Patti_lover20
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