1. Velocity, speed and acceleration
5m/s
velocity
5m/s North East
Velocity is speed
in a given direction
5m/s
speed
5m/s going round
An object moving at a
steady speed is accelerating
if its direction is changing

4. Acceleration = change in velocity (m/s)
time (s)
(m/s/s)
Acceleration is the change in velocity each second.
eg What is the acceleration of the cyclist?
Initial speed = 8 m/s
final speed = 20 m/s
time taken = 6 sec
acceln = v = 12 m/s
t s
= 2m/s/s

5. Acceleration = change in velocity (m/s)
time (s)
(m/s/s)
Acceleration is the change in velocity each second.
eg What is the acceleration of the cyclist?
Initial speed = 8 m/s
final speed = 20 m/s
time taken = 6 sec
acceln = v = 12 m/s
t s
= 2m/s/s

6. Acceleration = change in velocity (m/s)
time (s)
(m/s/s)
Acceleration is the change in velocity each second.
eg What is the acceleration of the cyclist?
Initial speed = 8 m/s
final speed = 20 m/s
time taken = 6 sec
acceln = v = 12 m/s
t s
= 2m/s/s

7. Initial speed = 8 m/s
final speed = 20 m/s
time taken = 6 sec
acceln = v = 12 m/s
t s
= 2m/s/s
Calculate these accelerations:
Q1. A motor bike accelerates from 10m/s
to 20m/s in 2 sec.
Q2. Concorde accelerates from rest to 40m/s
in 10 sec.
Q3. A wasp accelerates from 2m/s to 6m/s in 1sec.

8. Velocity
(m/s) 10 5
Acceleration is the gradient or slope
of a velocity : time graph. b a c
time / s

9. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = t

10. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = 10 m/s = 2 m/s/s
t s

11. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = 10 m/s = 2 m/s/s
t s
b. Uniform Velocity:

12. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = 10 m/s = 2 m/s/s
t s
b. Uniform Velocity: 10m/s ( zero acceln )

13. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = 10 m/s = 2 m/s/s
t s
b. Uniform Velocity: 10m/s ( zero acceln )
c. Steady deceleration: (- ve Acceleration)
acceln = v = - t

14. a b c
Velocity
(m/s) 10 5
time / s
Acceleration is the gradient or slope
of a velocity : time graph.
a. Steady Acceleration:
acceln = v = 10 m/s = 2 m/s/s
t s
b. Uniform Velocity: 10m/s ( zero acceln )
c. Steady deceleration: (- ve Acceleration)
acceln = v = -10 m/s = m/s/s
t s

15. The distance travelled is the area under a
v:t graph.
Velocity
m/s 10 5
time / s

16. The distance travelled is the area under a
v:t graph.
Velocity
m/s 10 5 b a c
time / s

17. The distance travelled is the area under a
v:t graph.
Velocity
m/s 10 5
5 x 10 = 25m 2 b a c
time / s

18. The distance travelled is the area under a
v:t graph.
Velocity
m/s 10 5
5 x 10 = 25m 2 b
10 x 10
= 100m a c
time / s

19. The distance travelled is the area under a
v:t graph.
Velocity
m/s 10 5
5 x 10 = 25m 2 b
10 x 10 = 50m 2
10 x 10
= 100m a c
time / s

20. If investigating how the slope of a runway affects a trolley’s acceleration:
a) Name The independent variable
2. The dependent variable
b) What is the relationship between the variables?

21. If investigating how the slope of a runway affects a trolley’s acceleration:
a) Name The independent variable
2. The dependent variable
b) What is the relationship between the variables?

22. a) Name 1. The independent variable 2. The dependent variable
Distance
from sensor
Time
If investigating how the slope of a runway affects a trolley’s acceleration:
a) Name The independent variable
2. The dependent variable
b) What is the relationship between the variables?

24. B A D C A C
A - has the largest area
under the graph
C - has the smallest area
under the graph

25. Which car has the highest acceleration? X or Y
Y - has the steepest slope

26. is constant. of an object decreases. speed acceleration speed
∆ v = = 20m/s
a = ∆ v = 20
∆ t
= m/s/s

29. accelerates
steady
steeper
steeper
slope
speed : time
ticker tape
trolley.