A particle performs S.H.M. of amplitude A along a straight line. When it is at a distance 
A from mean position, its kinetic energy gets increased by an amount 
m ꞷ 2 A 2 due to an impulsive force. Then its new amplitude becomes:
A
A
B
A
C
A
D
A
Text Solution
Verified by ExpertsThe correct answer is:
C
Due to impulse force, the total energy of the particle becomes:
mꞷ 2 A 2 + 
mꞷ 2 A 2 = mꞷ 2 A 2
Let; A' be the new amplitude. (Apply energy conservation law)
∴ 
mꞷ 2 (A') 2 = mꞷ 2 A 2
⇒ A' = 
A.
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