Question

A body is moving with a constant speed of 10 m/sec
in a circle of radius 10 cm, then its angular accelera-
tion will be
La zero
(6) 0.1 radian/sec
(e) 1 radian/sec (d) 10 radians/sec2
(e) 100 radians/sec2​

Answer 1

angular acceleration is zero .

Explanation:

The body is moving in a circle with constant velocity . Thus the linear acceleration remains zero .

That means no torque is applied in the tangential direction . Thus

τ = I α is zero .

Here I is the moment of inertia of the body rotating in a circular motion and α is the angular acceleration .

Because the moment of inertia of a body cannot be zero , therefore α is zero .

Thus the answer is ( a )