Two blocks of masses `m_(1)` and `m_(2)` are connected by an ideal sprit, of force constant `k`. The blocks are placed on smooth horizontal surface. A horizontal force `F` acts on the block `m_(1)`. Initially spring is relaxed, both the blocks are at rest.

Which of the following statement is not true tn the watt of above system.

Options

A. a. Centre of mass reference frame is an inertial frame.
B. b. Kinetic energy of the system is minimum in centre of mass frame.
C. c. At the instant of maximum deformation both the blocks are instantaneously at rest in centre of mass reference frame
D. d. Acceleration of centre of mass is constant in ground frame.

Answer

A

Explanation

Centre of mass has acceleration, so it cannot be inertial frame of reference.
Kinetic energy becomes minimum in centre of mass frame.