The maximum speed of a train is 80 km/h. It takes 10 h to cover a distance of 400 km. Find the ratio of its maximum speed to its average speed.

After studying the motion of a ball rolling on a straight line as shown in the figure.

Find its distance and displacement covered.

(i) when it rolls from P to Q and then to R (i.e., P to Q to R)

(ii) Finally comes back to P (i.e., P to P)(take, P as reference point).

Define average speed, write any one point of difference between average speed and average velocity.

Which of the two can be zero under certain conditions: average speed of a moving body or average velocity of a moving body?

(i) Give two factors on which acceleration depends.

(ii)Mention the formula and SI unit of acceleration.