The angular speed of an engine wheel making 90 revolutions

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

1. 1.5 π rad/s
2. 3π rad/s
3. 4.5 π rad/s
4. 6π rad/s

Correct Option: B

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

(ω) =	2πn	=	2π × 90	= 3 π rad/s.
	60		60