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Question

A pendulum swings through an angle of 30° and describes an arc 8.8 cm in length. Find the length of the pendulum.

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Solution

Given:
Length of the arc = 8.8 cm
And,
θ=30

Now,
Length of the arc =2πrθ360
8.8=2×227×r×30360r=8.8×360×744×30r=16.8 cm

∴ Length of the pendulum = 16.8 cm

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