Engineering Mechanics
Concurrent forces are those forces whose lines of action

Meet at one point
Lie on the same line
Meet on the same plane
None of these

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Engineering Mechanics
One joule means that

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

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