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Question

Which of the following statement is not true in the context of above system

A
centre of mass reference frame is an inertial frame.
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B
kinetic energy of the system is minimum in centre of mass frame.
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C
at the instant of maximum deformation both the blocks are instantaneously at rest in centre of mass reference frame.
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D
acceleration of centre of mass is constant is ground frame.
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Solution

The correct option is A centre of mass reference frame is an inertial frame.
A frame of reference that moves with constant velocity with respect to an inertial frame is also an inertial frame.
But in this case there is a constant acceleration applying continuously on this system, so this is a non-inertial frame.

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