Two blocks of masses 3kg and 6kg respect...

Two blocks of masses `3kg` and `6kg` respectivley are placed on a smooth horizontal surface. They are connected by a light spring of force constant `k=200N//m`. Initially the spring is unstretched. The indicated velocities are imparted to the blocks. Find the maximum extension of the spring.

57 cm

25 cm

20 cm

15 cm

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