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