Two blocks connected by a spring rest on a smooth horizontal plane as shown in the given figure....

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Two blocks connected by a spring rest on a smooth horizontal plane as shown in the given figure. A constant force \( F \) starts acting on block \( m_{2} \) as shown in the figure. Which of the following statements are not correct?
(1) Length of the spring increases continuously if \( m_{1}m_{2} \).
(2) Blocks start performing SHM about centre of mass of the system, which moves rectilinearly with constant acceleration.
(3) Blocks start performing oscillations about centre of mass of the system with increasing amplitude.
(4) Acceleration of \( m_{2} \) is maximum at initial moment of time only.
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