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.

The weight of a body of mass 6.0 kg on moon is 10 N. If a boy of mass 30 kg goes from earth to the moon surface, what will be his

(a) mass,

(b) weight?

Read the clues across and clues downwards fill up the blank squares.

Across :

2. Motion of a second's arm of a clock.
3. The movement of a guitar's strings produces …………… motion.
4. …………… speed = total distance travelled/total time taken.

Down :

1. Motion of hands of a clock is …………… motion.
2. An object is said to be in ……………, if its position changes with time.
3. The distance covered by a body in unit time is called …………… of a body.