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Two uniform discs A and B of equal radii...

Two uniform discs A and B of equal radii but having different masses 1 kg and 2 kg respectively, are connected (at centres) by a massless spring of spring constant `k = 1000 N m^(-1)` and then placed on a sufficiently rough horizontal surface. If initially, the system is released from rest with the spring being compressed by 10 cm, then the speed of A when the spring comes back to its natural length, is

A

`v_(A)=sqrt((40)/(9))ms^(-1)`

B

`v_(A)=sqrt((20)/(9))ms^(-1)`

C

`v_(A)=sqrt((20)/(3))ms^(-1)`

D

`v_(A)=sqrt((40)/(3))ms^(-1)`

Text Solution

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The correct Answer is:
A
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