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Three forces are acted on a body. Their ...

Three forces are acted on a body. Their magnitudes are `3N, 4N` and `5N`. Then,

A

the acceleration of body must be zero

B

the acceleration of body may be zero

C

the acceleration of the body must not be zero

D

none of the above

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(b) The magnitude of three forces `3N, 4N` and `5N` will be zero, if these vectors from a close polygon will all the sides in the same order as shown in figure. Hence, opiton (b) is correct
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