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A nonzero external force acts on a syste...

A nonzero external force acts on a system of particles. The velocity and the acceleration of the centre of mass are found to be`v_(0) "and"a_(0)` at an instant t. It is possible that:

A

`v_(0)=0,a_(0)=0`

B

`v_(0)=0,a_(0)ne0`

C

`v_(0)ne0,a_(o)=0`

D

`v_(0)ne0,a_(o)ne0`

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