The car of a wheel rotating with certain...

The car of a wheel rotating with certain angular velocity is stopped in 7 seconds and before it stops , it makes 35 revolutions . Then initially it was rotating with the frequancy .

`10 Hz`

`20 Hz`

`15 Hz`

`30 Hz`

Text Solution

Verified by Experts

The correct Answer is:

`N=(n_(1)+n_(2))/(2)xxt`
`thereforen_(1)=(2N)/(t)-n_(2)=(2xx35)/(7) -0=10 Hz`.

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