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Questions  

A point size mass 100 gm is rotated in a vertical circle using a cord of length 20cm. When the string makes an angle 60° with the vertical, the speed of the mass is 1.5m/s. The tangential accelaration of the mass in that position is……..ms-2

a
4.9
b
4.92
c
4.93
d
9.8

detailed solution

Correct option is C

Tangential acceleration = g sinθ= 9.8 x 32=4.93

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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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