A train takes 2 h to reach station B from station A, and then 3 h to return from station B to station A. The distance between the two stations is 200 km.

Find —

(i) The average speed

(ii) The average velocity of the train

A car moving on a straight path covers a distance of 1 km due east in 100 s.

What is

(i) the speed and

(ii) the velocity of car ?

A car starting from rest acquires a velocity of 180 m s^-1 in 0.05 h. Find the acceleration.

A body is moving vertically upwards. Its velocity changes at a constant rate from 50 m s ^-1 to 20 m s ^-1 in 3 s . What is its acceleration ?