Engineering Mechanics
The mechanical advantage of a lifting machine is the ratio of

Distance moved by effort to the distance moved by load
All of these
Load lifted to the effort applied
Output to the input

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Engineering Mechanics
One joule means that

Work is done by a force of 1 dyne when it displaces a body through 1 cm
Work is done by a force of 1 N when it displaces a body through 1 m
Work is done by a force of 1 kg when it displaces a body through 1 m
Work is done by a force of 1 g when it displaces a body through 1 cm

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