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A pendulum of length / = l m is released from θ0 = 600. The rate of change of speed of the bob at θ = 300 is (g = 10 m/s2)

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a
53  m/s2
b
5 m/s2
c
10 m/s2
d
2.5 m/s2
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detailed solution

Correct option is B

Rate of change of speeddvdt = tangential acceleration        = tangential forcemass        = mg sin 300m        = g sin 300        = 10(12)m/s2 = 5 m/s2

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