System Of Particles And Rotational Motion Ques 15

15. If a flywheel makes $120$ revolutions/minute, then its angular speed will be

[1996]

(a) $8 \pi $ $rad / sec$

(b) $6 \pi $ $rad / sec$

(c) $4 \pi $ $rad / sec$

(d) $2 \pi$ $ rad / s$

Show Answer

Answer:

Correct Answer: 15.(c)

Solution:

  1. (c) Angular speed, $\omega=\frac{120 \times 2 \pi}{60}=4 \pi $ $rad / sec$


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