Center of MassHard
Question
An external force 
acts on a system of particles. The velocity and the acceleration of the centre of mass are found to be vcm and acm , then it is possible that
acts on a system of particles. The velocity and the acceleration of the centre of mass are found to be vcm and acm , then it is possible that Options
A.vcm = 0, acm = 0
B.vcm = 0, acm ≠ 0
C.vcm ≠ 0, acm = 0
D.vcm ≠ 0, acm ≠ 0
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