A particle moves in a circle of radius \(5\) cm with constant speed and time period \(0.2\pi\) s. The acceleration of the particle is:

Two particles having mass \(M\) and \(m\) are moving in a circular path having radius \(R\) & \(r\) respectively. If their time periods are the same, then the ratio of angular velocities will be: 
1. \(\dfrac{r}{R}\)
 2. \(\dfrac{R}{r}\)
3. \(1\)
4. \(\sqrt{\dfrac{R}{r}}\)

For a particle performing uniform circular motion,

Choose the correct statement/s:

An insect trapped in a circular groove of radius \(12~\text{cm}\) moves along the groove steadily and completes \(7\) revolutions in \(100~\text{s}.\) What is the angular speed of the motion?