Kinematics
Physics Chapter 2
“What one man calls God, another calls the
law of physics”
-Nikola Tesla
Chapter Objectives - What you will learn
❏ 3 Key concepts
❏ Distance V.S Displacement, Velocity V.S Average Speed and
Acceleration
❏ 2 Advance Concept
❏ Graphical Analysis and Acceleration due to Gravity
Key Concept 1:
Distance V.S Displacement
Distance
VS
❏ Distance is defined as the total length travelled,
regardless of the direction
❏ Scalar Quantity
❏ Scalar is a physical quantity that has Magnitude
Only
❏ Unit : m (Metre)
A man walks along a
Curved path, from
Point A to B
55m
Displacement
❏ Displacement is defined as total length between
the start point and the end point, taking into the
account the direction.
❏ Vector Quantity
❏ Vector is a physical quantity that has Magnitude
& Direction
❏ Unit : m (Metre)
55m
80m
65m
Total Distance = 55 + 65 = 120m
80m
65m
Total Displacement = 80m East of Point A
Example
Kenneth jogs for 1km due east and makes a U-turn, he continued for another 2km.Calculate
a)The distance covered;
b)The displacement.
Example 1.
Take the direction towards East as positive. Leave the answer in km
start
end
1 km
1 km
start
end
2 km
1 km
Total Distance Travelled = 1 + 2 = 3 km
What is the displacement ??
Total Displacement = 1 - 2 = - 1 km ( or 1 km west)
Displacement is a vector quantity, direction must be
taken into account!!!
0
Thank You for your
attention
Q&A