In the given figure, ball A is released from rest when the spring is at its natural (unstretched) length. For the block B of mass M to leave contact with the ground at some stage, the minimum mass of A must be
Text Solution
Verified by ExpertsThe correct answer is:
C
The spring will exert the maximum force when the ball is at its lowest position. If the ball has descended through a distance 
to reach this position,
… (i)
where k is the force constant of the spring.
The block B to leave contact, spring force
. …(ii)
From equation (i) and (ii), we get 
.
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