48. The angular velocity of a body is
The angular velocity of a body is →w= 2^j+3^k+4^k and a torque →τ = ^j+2^k+3^k acts on it. The rotational power will be
(a) 20 W
(b) 15 W
(c) √17 W
(d) √17 W
Ans. a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a