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Q.

[81]

Is it true that car A is at rest and B has infinite speed according to the given figure below, showing the distance-time graph for two cars A and B?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is true.
Car A is at rest and car B has infinite speed.
The graph between time and distance gives information about speed. For car A the distance-time graph is a straight line parallel to the time axis. This shows that car A is at a fixed distance for every time interval, which means car A has zero speed. So, car A is at rest.
For car B, the distance-time graph is perpendicular to the time axis as the time is not changing with respect to the distance. This shows that car B has infinite speed.
 
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