A particle is moving in a circular path of radius $r$. The displacement after half a circle would be :
$2r$
$\pi r$
Zero
$2\pi r$
Give an expression for the speed of an athlete if he takes time $'t^{\prime}$ to go around a circular track, of radius ${ }^{\prime} r^{\prime}$
A moving body is covering a distance directly proportional to the square of time. The acceleration of the body is
What can you say about the motion of a body if its displacement$-$time graph is a straight line parallel to the time axis ?
What conclusion can you draw from the displacement$-$time graph of a body as shown below ?
State the type of motion represented by the given graph.