Study the speed$-$time graph of a body given below and answer the following questions

$(i)$ What type of motion is represented by $OA, AB$ and $BC$ ?

$(ii)$ Find positive and negative accelerations of the body.

$(iii)$ Find the distance travelled by the body from $A$ to $B$.

Write true or false for the following statements

In one$-$dimensional motion, the average velocity and the instantaneous velocity are unequal.

In a long distance race, the athletes were expected to take four rounds of the track such that the line of finish was same as the line of start. Suppose the length of the track was $200\, m$.

$(a)$ What is the total distance to be covered by the athletes ?

$(b)$ What is the displacement of the athletes when they touch the finish line ?

$(c)$ Is the motion of the athletes uniform or nonuniform ?

$(d)$ Is the displacement of an athlete and the distance moved by him at the end of the race equal ?

How can you find the following ?

$(i)$ Velocity from a displacement$-$time graph.

$(ii)$ Acceleration from velocity$-$time graph.

$(iii)$ Displacement from velocity$-$time graph.

$(iv)$ Velocity from acceleration$-$time graph.

What type of motion is represented by the following graphs ?