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Question

The following graph shows the change of a car's speed with time. How far did the car travel (in m) before it reached a constant speed?


  1. 100

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Solution

The correct option is A 100
From the given graph:
The slope is increasing from time, t1=0 s to t2=10 s.
In this time interval, the speed has increased from v1=0 m s1 to v2=20 m s1.

The distance travelled by the car before it reaches a constant speed = Area of the triangle = 12×20×10

10 m s1×10 s=100 m

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