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88. In a playground there is a merry-go-round of mass 120 kg and radius 4 m. The radius of gyration is 3m. A child of mass 30 kg runs at a speed of 5 m/sec tangent to the rim of the merry-go-round when it is at rest and then jumps on it. Neglect friction and find the angular velocity of the merry-go-round and child

(a)           0.2 rad/sec

(b)          0.1 rad/sec

(c)           0.4 rad/sec

(d)          0.8 rad/sec

Ans. c

(74)

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