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In the system shown, the wire connecting two masses has linear mass density of 1 / 20 kg/m. A tuning  fork of 50 Hz is found to be in resonance with the horizontal part of wire between pulley and block A. (Assuming nodes at block A and pulley). Now at t = 0, system is released from rest. The ratio of time gap between successive resonance with the same tuning fork starting from t = 0. (take g = 10 m/s2 )

(A) 2 : 1 

(B) 1 : 2 

(C) 1 : 2 - 1 

(D) 1: 2

1 Answer

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Best answer

Correct option: (C) 1 : 2 - 1

Explanation:

4a = 4g – T

4a = T

T = 20 N 

a = 5

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