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A flywheel rotates with a uniform angula...

A flywheel rotates with a uniform angular acceleration. Its angular speed increases from `2pirad//s` to `10pirad//s` in `4 s`. Find the number of revolutions in this period.

A

`80`

B

`100`

C

`120`

D

`150`

Text Solution

Verified by Experts

`theta=bar(omega)t=((omega_(0)+omega)/(2))t=((20pi+40pi)/(2))(10)=300pi`
Number of rotations `n=(theta)/(2pi)=150`
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