Page 68 - eEISBN FINALIZE

Halaju (ms -1)

-2
Uniform deceleration , -a ms .

Masa (s)

Figure 5.2.2

From the velocity-time graph:

Gradient = Acceleration / decelaration.

The area under the graph = distance traveled.

Example 1

-2
-1
A car starts from rest with a constant acceleration of 0.6 ms until it reaches a speed of 9.8 ms .
Then the car is moving at a constant velocity of 2.7 km before decelaration with uniforms for 20
seconds before it stops again. Calculate:

i. Total distance traveled.

ii. The total time taken.

Solution:

Suppose: The distance traveled, sT.

Distance during acceleration, s1.

Distance during uniform velocity, s2 = 2700 m.

Distance during decelaration, S3.

s = s + s + s
1
T
2
3

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