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Q.

A simple pendulum of length 20 cm and of mass 0.1 kg is pulled to one side through an angle 'θ ' and released. If its maximum velocity is 1.4ms−1 , the value of 'θ ' is

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a

300

b

450

c

600

d

900

answer is C.

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Detailed Solution

v=2gℓ(1−cosθ) (1.4)2=2×9.8×20×10−2(1−cosθ) θ=600

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