System of Particles and Rotational Motion - Result Question 17

17. The angular speed of an engine wheel making 90 revolutions per minute is

(a) 1.5πrad/s

(b) 3πrad/s

(c) 4.5πrad/s

(d) 6πrad/s

[1995]

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Answer:

Correct Answer: 17. (b)

Solution:

  1. (b) Number of revolutions made by the engine wheel (n)=90 per minute.

Angular speed of the engine wheel

(ω)=2πn60=2π×9060=3πrad/s.



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