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ps ch5
Term | Definition |
---|---|
work | transfer of energy that occurs when a force makes an object move measured in joules |
power | amount of work done or the amount of energy transferred divided by the time required to do the work or transfer the energy measured in watts |
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 | the force that is applied to a machine |
output force | the force applied by the machine |
mechanical advantage | ratio 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 |