Uniform Circular Motion

What do you understand by a uniform circular motion?

Particles $\mathrm{P}$ and $\mathrm{Q}\mathrm{}$ are undergoing uniform horizontal circular motions along concentric circles of different radii in clockwise sense $\mathrm{P}$ completes each round in $2 \min$ while $\mathrm{Q}$ does it is $5 \min$ time required by $\mathrm{Q}$ to make one revolution around $\mathrm{P}$is :

Look at the figure below and answer the following questions:

What is the direction of this force? Draw it in your answer sheet.

Look at the figure below and answer the following questions:

Name the force that keeps the stone in its path.

Look at the figure below and answer the following questions:

Is this an example of accelerated motion? Why?

Look at the figure below and answer the following questions:

Name the kind of motion of the stone.

Assertion: A body performing uniform circular motion with constant speed may have acceleration.
Reason: When speed of a body remains constant, then its acceleration is always zero.

Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of $10 {\mathrm{m} \mathrm{s}}^{-1}$. It implies that the boy is :

If a body is moving on a circular path of radius $21 \mathrm{m}$ with velocity of $2 \mathrm{m} {\mathrm{s}}^{-1}$, then time taken by the body to complete half revolution is :