Page 43 - text book form physics kssm 2020

Chapter 2 Force and Motion I

2.2 Linear Motion Graphs

Interpretation of graphs is important to understand the type of linear motion of an object.
Figure 2.17 shows the interpretation of the types of linear motion from graphs.

Displacement Velocity-time Acceleration
-time graph graph -time graph
Displacement, s / m Velocity, v / m s Acceleration, a / m s –2
–1

0
Time, t / s Time, t / s Time, t / s

Object moving with
(a) Object at rest (a) (a) Object moving with zero
uniform velocity acceleration

–1
Displacement, s / m Velocity, v / m s Acceleration, a / m s –2

0
Time, t / s Time, t / s Time, t / s
Object moving with
(b) Object moving with (b) (b) Object moving with
uniform velocity uniform acceleration uniform acceleration

–1
Displacement, s / m Velocity, v / m s Acceleration, a / m s –2

0
Time, t / s Time, t / s Time, t / s
(c) Object moving with (c) (c) Object moving with
Object moving with
acceleration uniformly decreasing velocity increasing acceleration

For displacement-time graph: For velocity-time graph:
Gradient of the graph = velocity Gradient of the graph = acceleration
Area under the graph = displacement

Figure 2.17 Interpretation of types of linear motion from graphs
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2.2.1
2.2.1