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A nonzero external force on a system of ...

A nonzero external force on a system of particles. The velocity and the acceleration of the cente 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) = 0`

C

`v(0) = 0, a_(0) != 0`

D

`v(0) != 0, a_(0) != 0`

Text Solution

Verified by Experts

The correct Answer is:
C, D
When external force is non zero, acc. Cannot be zero. However, the centre of mass may be at rest or may be moving with some velocity. Therefore,
`v_(0) = 0 or v_(0) != 0`, but `a_(0) != 0`.
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