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When a disc rotates with uniform angular...

When a disc rotates with uniform angular velocity, which of the following is not true ?

A

The sense of rotation remains same.

B

the orientation of the axis of rotation remains same.

C

the speed of rotation is non-zero and remain same.

D

the angular acceleration is zero.

Text Solution

Verified by Experts

The correct Answer is:
D
We know that angular acceleration `alpha=(domega)/(dt)` given `omega`=const.
Where `omega` is angular velocity of the disc
`rArralpha=(domega)/(dt)=0/(dt)=0` Hence, angular acceleration is zero
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