$A$ body performing uniform circular motion completes $140$ revolutions in a second. Its angular speed is .......... $rad/s$.

For uniform circular motion,write the equations for centripetal force and centripetal acceleration. Also,provide examples.

In the case of uniform circular motion,which of the following physical quantities does not remain constant?

The figure shows a small wheel fixed coaxially on a bigger one of double the radius. The system rotates about the common axis. The strings supporting $A$ and $B$ do not slip on the wheels. If $x$ and $y$ are the distances travelled by $A$ and $B$ in the same time interval,then

If a particle covers half the circle of radius $R$ with constant speed $v$,then:

Assertion $(A)$: The speed of a body in uniform circular motion is constant.
Reason $(R)$: In uniform circular motion,the acceleration of the body is constant.