$(a)$ Define circular motion.

$(b)$ "Uniform circular motion is an accelerated motion". Justify this statement with reason.

$(c)$ An artificial satellite is moving in a circular orbit of radius $42250\, km.$ Calculate its speed if it takes $24$ hours to revolve once around the earth.

Area under a $v -t$ graph represents a physical quantity which has the unit

The distance$-$time graph of a body is a straight line inclined to time axis. The body is in

A body is moving along a circular path of radius $R$. Find the displacement of the body when it completes half a revolution.

The position$-$time graph for the motion of a car is given below

$(i)$ How far the car tavelled in the time interval $2$ to $6 s ?$

$(ii)$ During which interval of time its speed was more?

$(iii)$ Calculate the average speed of the car.