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  • 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 remains same.

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 remains same.
(d) The angular acceleration is non-zero and remains same.

Answers (1)

The answer is the option (d)

Angular acceleration is given by =\frac{d\omega }{dt}

 When \omega is constant, d\omega is equal to zero. Thus \alpha =0.

                    

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