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Blocks of masses 0.5 kg each, resting on...

Blocks of masses 0.5 kg each, resting on a horizontal frictionless tabletop, are connected with an unstrethched speing of length L = 20 cm, and of spring constant 16 N/m. The mass of the spring is negligible art a certain moment the blocks are given an initial speed of `v_(0)=0.36m//s` towards the wall. The block at the right collides with the wall elastically :

A

There will be 2 colllisions whith the wall

B

After 1st collision centre of mass comes to rest

C

After 2nd collision centre of mass moves to left with speed `v_(0)`

D

After all collisions are over the system oscillates avout the centre of mass

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