A nonzero external force acts on a system of particles.
A nonzero external force acts on a system of particles. The velocity and the acceleration of the centre of mass are found to be v0 and a0 at an instant t. It is possible that
(a) vo = 0, a0 = 0
(b) v0 = 0, a0 ≠ 0,
(c) v0 ≠ 0, a0 = 0
(d) v0 ≠0,a0≠ 0.
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(b) v0 = 0, a0 ≠ 0,
(d) v0 ≠0,a0≠ 0.
Explanation:
Since the external force is nonzero, there will be nonzero acceleration. Hence (b) and (d).
It may be at rest at time t, then (b) otherwise (d).
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