Question

In pure rotation,
(a) all particles of the body move in a
straight line
(b) all particles of body move in concentric
circles
(c) all particles of body move in non-concentric
circles
(d) all particles of body have same speed​

Answer 1

Explanation:

When a rigid body is in pure rotational motion, all particles in the body rotate through the same angle during the same time interval. Thus, all particles have the same angular velocity and the same angular acceleration.

Answer 2

Answer:

Explanation:

(b)All particles of body move in concentric circles

Pure rotation means the the body seems to be hinged at some point and free to rotate about the axis passing through  that point so consequently every point of the body move in concentric circles having center at that hinged point.

For example:- A rod hinged at one end or a disc hinged at the center.

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