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Three forces are acting on a particle of...

Three forces are acting on a particle of mass m intially in equilibrium. If the first two forces `(R_(1) and R_(2))` are perpendicular to each other and suddenly the third force `(R_(3))` is removed, then the acceleration on the particle is

A

`F_1//m`

B

`F_1F_3//mF_1`

C

`(F_2-F_3)//m`

D

`F_2/m`

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A
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