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A bob is attached to a long, light string. The string is deflected by 30° initially with respect to vertical. The length of the string is 1 m. The value θ of at any time t after the bob has been released is (Use g =π2 ) :

(A) 30° cosπt

(B) 30° sinπt

(C) 30° sin( πt + 30° )

(D) None of these

1 Answer

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Correct option: (D) None of these


For large angle like this (30º), the bob's motion is oscillating and note simple harmonic. In options A, B, C the equations written are of SHM. So the answer is D.

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