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Q.

A pendulum oscillates in a vertical plane. When the bob is at extreme position, its acceleration is 5m/s2. If g=10 m/s2, angular amplitude of oscillation of the pendulum is

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Detailed Solution

At extreme position A, tangential unbalanced force acting on the bob is  mg sinϕ. So acceleration at this position a=mgsin⁡ϕm=gsin⁡ϕ∴Given   10 sin⁡ϕ=5⇒sin⁡ϕ=12⇒ϕ=30o
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