111. A wheel of moment of inertia 10 kg
A wheel of moment of inertia 10 kg-m2 is rotating at 10 rotations per minute. The work done in increasing its speed to 5 times its initial value, will be
(a) 100 J
(b) 131.4 J
(c) 13.4 J
(d) 0.131 J
Ans. b
(14)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)