A boy walks a distance of 30 m in 1 minute and another 30 m in 1.5 minute. Describe the type of motion of the boy and find his average speed in m s^-1.

A cyclist travels a distance of 1 km in the first hour, 0.5 km in the second hour and 0.3 km in the third hour. Find the average speed of the cyclist in:

(i) km h^-1

(ii) m s^-1.

A car travels with speed 30 km h^-1 for 30 minutes and then with speed 40 km h^-1 for 1 hour. Find:

(a) the total distance travelled by the car.

(b) the total time of travel, and

(c) the average speed of the car.

On earth the weight of a body of mass 1.0 kg is 10 N. What will be the weight of a boy of mass 37 kg in

(a) kgf

(b) N