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In the system shown in figure block A is...

In the system shown in figure block A is not attached with wall. Block B is compressed 1m and then relesed at time t = 0. Then,

A

net force of the system is non zero for `lt(pi)/8` second

B

net force on the system is non zero all the time

C

final velocity of centre of mass is 4 m/s

D

finsal velocity of centre of mass is 2 m/s

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