A light spring of length l and spring constant K is placed vertically on the table. A small ball of mass m is released on it. Height from the surface of the table at which the ball will have maximum velocity
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a
l
b
l−2mgK
c
Greater than l
d
l−mgK
answer is D.
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Detailed Solution
Acceleration a = mg - k∆xVelocity will be maximum when a = 0∴Δx=mgkSo height h = l−mgK
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A light spring of length l and spring constant K is placed vertically on the table. A small ball of mass m is released on it. Height from the surface of the table at which the ball will have maximum velocity