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on FreezingBlue Flashcards.
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trnasfer of energy that occurs when a force makes an object move
work
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the amount of work done in a certain amount of time
power
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formula for power (watts)=
p=w/t
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components of a watt=
joules per second (j/s)
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device that makes doing work easier
machine
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force applied to the machine
effort force
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force applied by the machine
resistence force
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the number of times a machine multiplies the effort force
mechanical advantage
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measure of how much work put into a machine is changed into useful output work by the machine
efficency
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machine machine that does work with only one movement
simple machine
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bar that is free to pivot, or turn, about a fixed point
lever
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grooved wheel with a rope, chain, or cable running along a groove
pulley
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machine consisting of two wheels of different sizes that rotate together
wheel and axle
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sloping surface that rweduces the amount of force required to do work
inclined plane
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inclined plae wrapped in a spiral around a cylinder
screw
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inclined plane with one or two sloping sides
wedge
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when two or more simple machines work together
compound machine
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