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If no external force acts on the system ...

If no external force acts on the system
(a) acleleration of centre of mass is zero
(b) Velocity of centre of mass is zero
(c) Centre of mass may be at rest (or) moving with constant velocity
(d) Velocity and momentum of centre of mass remains constant

A

a, b and c are true

B

a, c and d are true

C

b, c and d are true

D

a, b, c and d all are true

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The correct Answer is:
B
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