This document discusses speed and acceleration. It defines speed as a rate of travel and provides examples of calculating speed using the formula: Speed = Distance / Time. It includes examples such as calculating the speed of a plane traveling 395,000 meters in 9000 seconds. It also discusses using distance-time graphs to determine speed and defines average speed. Finally, it briefly introduces the concept of acceleration.

1. SPEED&ACCELERATION
CHAPTER 9

3. WHAT IS SPEED?
This car is travelling at 80 km/h. What does it mean?

4. WHAT IS SPEED?
This jet is travelling at 350 m/s. What does it mean?

5. SPEED AS A RATE
TAKE A LOOK AT THE BACK TRUCK OR BUS, WHAT WILL THE
CONSEQUENCES BE IF THE DRIVER DOES NOT COMPLY WITH
THE SPEED LIMIT STATED ON THE SYMBOL???

8. HOW TO CALCULATE SPEED?

10. EXAMPLE 1

11. A plane travels 395,000 meters in 9000 seconds. What was its speed?
EXAMPLE 2

12. EXAMPLE 3
In a competition, an athlete threw a flying disk 139 meters through
the air. While in flight, the disk travelled at an average speed of 13.0
m/s. How long did the disk remain in the air?

13. EXAMPLE 4
A storm is moving toward your house at a speed of 20 km/hr. It is now 60 km
away from your house. In what time will the storm reach your house?

14. EXAMPLE 5
A swimmer can swim at a speed of 2.8 m/s for 6 minutes. What distance will
she cover in that time?

15. EXAMPLE 6
You are traveling at 100 km/hr to make it to work on time. You have to be
to work in 0.25 hr or you will be late. You have 16 km to travel. Will you
make it to work on time?

16. EXAMPLE 7 Convert the following speed:

17. EXAMPLE 7 Convert the following speed:

18. EXAMPLE 7 Convert the following speed:

19. EXAMPLE 7 Convert the following speed:

20. EXAMPLE 7 Convert the following speed:

21. EXAMPLE 7 Convert the following speed:

23. EXAMPLE 8

24. ENCIK MAHESH HIT THE GOLF BALL FROM
POLE P TO POLE S PASSING THROUGH
POLE Q AND POLE R.DID THE GOLF BALL
HAVE A UNIFORM SPEED?EXPLAIN.
EXAMPLE 9

25. SPEED

26. DISTANCE – TIME GRAPH

27. DISTANCE – TIME GRAPH

30. AVERAGE SPEED

31. A bus departs from Puchong at 0825 and arrives in Perai
at 1345.
If the total distance travelled is 354 km,
Calculate the average speed in km/h
EXAMPLE 10

32. EXAMPLE 11

33. EXAMPLE 12

34. EXAMPLE 13

35. ACCELERATION

38. EXAMPLE 14

39. EXAMPLE 15

40. EXAMPLE 16