Give an expression for the speed of an athlete if he takes time $t$ to complete one round of a circular track of radius $r$.

Define distance and displacement. $A$ body covers one complete revolution around a circular park of circumference $176 \, m$ in $4$ minutes. Find the displacement of the body after $6$ minutes.

An object is moving with uniform speed in a circle of radius $7 \, m$. Calculate the distance and displacement when it completes half the circle. What type of motion does the object possess?

Draw a diagram to show the motion of a body whose speed remains constant but velocity continuously changes.

$(a)$ Define uniform circular motion.
$(b)$ Is the uniform circular motion an accelerated motion? Give reasons for your answer.

What is the amount of work done by a force when a body moves in a circular path?