Physics Form 4 Exercise

Exercise

1. A cow moves 3m to the east and then 4m to the north. Find the

(a) Total distance moved by the cow.

(b) Displacement of the cow

2. In a 200m swimming competition, a swimmer takes 12.2s for the first lap, 12.6s for the second lap, 12.8s for the third lap and 12.5s for the fourth lap. One lap is 50m long. Find the average speed of the swimmer.

3. A man running in a race covers 60m in 12s.

(a) What is his speed in

(i) m s-1

(ii) km h-1

(b) If he takes 40s to complete the race, what is his distance covered?

(c) Another man runs with a speed 7.5ms-1, how long did he take to complete the race ?

4. A car starts from point O and moves 50m to the north in 60seconds. The car then moves 120m to the east in 40seconds. Finally, it stops. Calculate the…

(a) Total distance moved by the car

(b) Displacement if the car

(c) Velocity of the car

(d) Average speed of the car

(e) Speed of the car when it is moving to the north

5. A vehicle accelerates uniformly from rest to a speed of 25ms-1 in 100s along a straight road. It ten decelerates uniformly at 0.2ms-2 for 60s. Find

(a) The initial acceleration

(b) The final speed after decelerating

6. A runner runs from the starting line and achieves a velocity of 18ms-1 in 3seconds. Calculate his acceleration.

7. __=8m

__ = 5m

8.

70m

A car moving round a big roundabout which has a radius of 70m. Calculate

(a) The distance moved by the car

(b) The displacement of the car

9. If a boy takes 10s to finish each of the following paths AB, find the total distance travelled, displacement and average speed in each case. (Take π=3.14)

8m

6m...