Work and Power Quiz - Unit 6 Simple Machines
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12 Terms
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Simple Machines
Changes the amount or direction of a force
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Machine
Anything that helps make work easier
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How is work done?
Work is done when a force moves an object or changes its position
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When ___ is done _______ is used up
When work is done energy is used up
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Work = ___ • ____
Work = Force (Newtons) • distance (meters)
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Unit for work
Joules
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Formula for work
W = F • d
F = W ÷ d
d = W ÷ F
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Do Simple machines create force?
No, they transform it.
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How does a simple machine do work?
There must be an Input force supplied to the machine which leads to an output force from the machine.
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When is work done?
Work is only done if something is moving.
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Power
The rate at which work is done. (work per unit of time
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Formula for Power
Note 
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