1.

A spring mass system is held at rest at height H from the ground with the spring in relaxed state. Find the minimum value of H so that the sytem has a tendency to rebound after hitting the ground. (Here mass m_(2) is stick with ground after collision i.e. between m_(2) and ground perfect inelastic collision)

Answer»

`(m_(2)g)/K((2m_(1)+m_(2))/(2m_(1)))`
`(m_(2)g)/(2K)((2m_(1)+m_(2))/(2m_(1)))`
`(m_(2)g)/K`
`((2m_(1)+m_(2))/(2m_(1)))`

ANSWER :A


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