A block carrying a small removable mass sits on a frictionless horizontal surface and is attached to a spring of spring constant 
. Initially the combined mass is 
(i.e. block + small mass) and the system oscillates with amplitude 
0.2 m. When the block passes through the equilibrium position, the small mass 
is gently removed. Immediately after removal, the amplitude of the remaining block's oscillation is:
Text Solution
Verified by ExpertsB
At the instant of removal, the system is at equilibrium and therefore has the maximum speed of the original motion: 
So 
.
After removal the new mass is 
so the new angular frequency is
The new amplitude 
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