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Questions  

A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s2 at a distance of 5 m from the mean position. The time period of oscillation is

a
2πs
b
π s
c
2 s
d
1 s

detailed solution

Correct option is B

a=ω2x     ⇒20=ω25     ⇒ ω2=4    ⇒ω=2      ⇒2πT=2    ⇒    T=πs

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