Two blocks connected by a spring rest on...

Two blocks connected by a spring rest on a smooth horizontal plane as shown in Fig. A constant force `F` start acting on block `m_2` as shown in the figure. Which of the following statements are not correct?

length of spring increases continuously if `m_(1) gt m_(2)`

blocks start performing SHM about centre of mass of the system with increasing amplitude

blocks start performing SHM about centre of mass of the system which moves rectilinearly with constant acceleration

acceleration of `m_(2)` is maximum at initial moment of time only

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