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

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

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Engineering Mechanics
Coplanar concurrent forces are those forces which

Meet at one point and their lines of action also lie on the same plane
Do not meet at one point and their lines of action do not lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane
Do not meet at one point, but their lines of action lie on the same plane

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