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The angula speed of a fly-wheel making ...

The angula speed of a fly-wheel making 120 revolutions /minute is :

A

`pi ` rad / sec

B

` 4 pi` rad / sec

C

`2pi` rad / sec

D

`4 pi^(2)` rad / sec

Text Solution

Verified by Experts

The correct Answer is:
B
`omega = 2 pi n`
`n = (120)/(60) = 2`
`:. omega = 2 pi xx 2 = 4 pi ` rad/sec
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