1. NUR ELYANI BINTI MUSA
JMSK

2. 
Hair Raiser Roller Coaster POV Ocean Park
Hong Kong B M Floorless On-Ride - 3.wmv

3. Define scalar and vector quantities.
Define linear motion
 Define uniform and non-uniform motion.
 Describe distance, displacement, speed, velocity, average velocity,
instantaneous velocity, acceleration and deceleration.
 Apply the concept of linear motion in solving the related problems
by using formula
 Illustrade velocity – time graph.
 Determine the velocity, acceleration and displacement from the
graphs.



4. Objective……
Define scalar
quantity and
vector quantity
Definition
 Quantity which has magnitude only.
Example
 Distance, speed, Length, Time, density

5. Objective……
Define scalar and
vector quantity
Definition
- Quantity which have both magnitude
and direction.
Example
 Displacement, velocity, Force,
Acceleration

6. Objective……
Define linear
Motion


Linear motion is the motion of an
object, moving in a straight line
or path.
The movement of any object
depend on frequent questions:
How far !
How fast !
Which direction !

9. Objective……
Define uniform
motion
Define non –
linear motion
Definition
Uniform motion is reaching and
maintaining its maximum speed on a
straight line.
Example


A falling coconut
A car moving in same speed in a
straight line

10. Objective……
Define uniform
motion
Define non –
linear motion
Definition
Non linear motion that undergoes a
change in velocity, either by changing
speed or changing direction.
Example
 A roller coaster ride
 A snake crawling

11. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
Distance (How far)
 Definition is total route taken from one place
into another place.
 Scalar Quantity because it has magnitude
only
 SI unit is meter
Displacement
 Definition is distance along with direction
 Vector quantity because it has both
magnitude & direction.
 SI unit is meter (m)

12. Distance
An aeroplane is flying from Airport A to
Airport B with a long distance about
350km without direction.
Displacement
But if the aeroplane use a direction move
towards Airport B, its displacement is
100km.

13. Speed
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
Velocity
 Speed is the rate of
 Velocity is the rate of
change of distance.
change of displacement.
 Speed is scalar quantity.  Velocity is vector
quantity.
Speed = Distance, m
Time, s
 SI unit is meter per
second (ms-1).
Velocity = Displacement, m
Time, s
 SI unit is meter per
second (ms-1).

14. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
Average Velocity
Instantaneous Velocity
Average velocity is Instantaneous
for velocity of entire Velocity is velocity of
trip.
an object at the
particular instant or
time.

15. Acceleration
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
Deceleration.
Acceleration is the rate change of
Deceleration is the rate change
velocity.
of velocity that has negative value.
Acceleration is vector quantity.
(Slowing down)
Acceleration = v - u
Acceleration = v - u
t
t
Where :
Where :
v = Final velocity (last high value)
v = Final velocity (last value)
u = Initial velocity(start to moving)
u = Initial velocity(start to slowing
t = time
down)
t = time
SI unit is ms-2.
Example : A car starts to move
slowly after max speed.
Example : A car starts to move fast
SI unit is ms-2.
From rest or low speed.
*Formula same as acceleration.

16. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A student walks to the south for 30 m, then to the east for 40 m and
finally to the north for 30 m before he stops to rest. The total time
taken by the student for the whole journey is 40 seconds.
a) What is the total distance travelled?
b) What is the displacement of the student?
c) What is the average speed of the student and his velocity?
Solution
Total distance = 30 m + 40 m + 30 m
Rest place
Starting Point
= 100 m
Displacement = 40 m to the east.
Displacement
30 m
30 m
40 m
Average speed = 100 m
40
= 2.5ms -1
Velocity
= 40 m = 1.0 ms¯ ¹
40 s

17. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
In a car test, the velocity of a car increases
uniformly from rest to 30 ms-1 in 15 seconds.
What is the acceleration of the car?
Solution:
Acceleration = Final Velocity, v – Initial Velocity, u
Time taken, t
= 30 ms -1 – 0 ms-1
15 s
= 2 ms-2

18. Quantity
Apply the
concept of
linear motion in
solving the
related
problems by
using formula
Symbol
Unit
Distance/displacement
s
m
Time
t
s
Initial Velocity
u
ms¯¹
Final Velocity
v
ms¯¹
Acceleration/deceleration
a
ms¯²
Equation
Unit
Physic Quantity
Displacement
Velocity
Acceleration
M
(Metre)
V = u + at
ms¯¹
(metre/second)
A=v – u
t
ms¯²
(metre/second)

19. Apply the
concept of
linear motion in
solving the
related
problems by
using formula
A driver accelerates his car from 20 ms¯².
What is his velocity after 8 seconds ?
3 quantities
are known
Solution :
U = 20ms¯¹
First trial
Second trial
a = 2 ms¯²
?  x
v = u +2 a s
?  
v=u+at
v = 20 + 2 (8)
= 36 ms¯¹
t = 8s
v=?
Unable to calculate,
because only two quantity
are known

20. v, m sˉ¹
Illustrade
velocity – time
graph.
 Increasing velocity
 Constant/Uniform acceleration
v, m sˉ¹
t (s)
 Constant/Uniform velocity
 Zero acceleration
v, m sˉ¹
t (s)
 Decreasing velocity
 Constant/Uniform deceleration
t (s)

21. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
Exercise
A. A cow moves 3 meter to the east and
then 4 meter to the north. Find the :
i. Total distance moved by the cow
ii. Displacement of the cow
B.
A runner runs from the starting line
and achieves a velocity of 18m/s in 3
seconds. Calculate his acceleration.

22. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A cow moves 3 meter to the east and then 4 meter to the north.
Find the :
i)
Total distance moved by the cow
ii)
Displacement of the cow
Solution :
C
4m
A
3m
B
C
5m
A
3m
4m
B
The total distance moved by the cow
= Length of AB + Length of BC
= 3m + 4m
= 7m
AC = √AB²+ BC²
= √3²+ 4²
= √9+ 16
= √25
= 5m

23. Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A runner runs from the starting line and
achieves a velocity of 18m/s in 3 seconds.
Calculate his acceleration.
Solution
u = o m/s v = 18 m/s t = 3s
a=v–u
t
a = 18 – 0
3
a = 6 m/s²

24. Q1(d)
A.
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A runner runs from the starting line
and achieves a velocity of 20 m/s¹ in
2.6 seconds. (CLO3)
i.
Calculate his acceleration (2 marks)
ii.
If the acceleration is constant,
calculate the displacement traveled
in 6.5 second.
( 2 marks)

25. A.
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A runner runs from the starting line and
achieves a velocity of 20 m/s¹ in 2.6
seconds. (CLO3)
i.
Calculate his acceleration (2 marks)
v = u + at
20 = 0 + a(2.6) …………..(1 m)
a = 20
2.6
a = 7.69 m/s² …………(1 m)

26. A runner runs from the starting line and
achieves a velocity of 20 m/s¹ in 2.6
seconds. (CLO3)
ii If the acceleration is constant, calculate
the displacement traveled in 6.5 second.
A.
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
(2 marks)
s = u t + 1 at²
2
s = 0 + 1 ( 7.69) (6.5) ² ………( 1 m)
2
s = 162.45 m
…………..( 1 m)

27. Q1(d)
Objective……
Describe distance
, displacement,
speed, velocity,
average velocity,
instantaneous
velocity,
acceleration &
deceleration
A car starting from rest and accelerates at a constant
acceleration of 5 m/s² for 10 s. The car then travels at a
constant velocity for 15 s. the brakes are then applied
and the car stops in 5 s.
i.
Sketch a velocity- time graph for the whole
journey
a=v–u
t
5=v–0
10
v = 50 m/s
v (m/s)
50
0
10
25
30
t (s)

28. Achieved the
objective
Define scalar and vector quantities.
Define linear motion
Define uniform and non-uniform motion.
Describe distance, displacement, speed, velocity,
average velocity, instantaneous velocity, acceleration
and deceleration.
 Apply the concept of linear motion in solving the
related problems by using formula
 Illustrade velocity – time graph.
 Determine the velocity, acceleration and
displacement from the graphs.





29. 
shows a person move with 2ms-1 along a circular path. The
magnitude of the quickness is the same, but the direction
keeps changing. Hence we say that the velocity of this person
keep changing when he moves through the path.

30. www.youtube.com
Modul BB101 – Engineering Science (JMSK)