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Calculate the angular speed of flywheel making 420 revolutions per minute.

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in Engineering Physics I by (558k points)
Calculate the angular speed of flywheel making 420 revolutions per minute.

(a) 42300 rad/sec

(b) 1200 rad/sec

(c) 10/4200 rad/sec

(d) 44 rad/sec

This question was addressed to me during an interview.

This interesting question is from Motion in a Plane in portion Laws of Motion of Engineering Physics I

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The correct choice is (d) 44 rad/sec

The explanation: v = 420/60 revolution/ second

ω = 2πv = 2 × 22/7 × 420/60 = 44rad/sec.

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