1.

In the arrangement shwon, initially both springs are in their natural length l_(0). The left spring has force constnat k_(0)=2N//m and the force constant of the right spring varies as k=k_(0)x, wherex is its compression. The mass of the block is 10/3 kg. At time t=0, the block is given a right ward velocity v_(0)=2 m/s. Both the springs are massless. When the block has moved through distance x_(0) m to the right, the elastic potential energy stored in the right spring is

Answer»

`(2x_(0)^(3))/3J`
`(x_(0)^(2))/2J`
`(x_(0)^(3))/6J`
`4/3x_(0)^(3)J`

Answer :A


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