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Q.

Is it true that if the shape of the distance-time graph is concave upwards, it represents decreasing speed?


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a

True

b

False

answer is A.

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Detailed Solution

The above statement is True.
The acceleration increases with the slope of the line. On a graph, if the line slopes downward from left to right, the object is slowing down. During that part of the curve, if the curve is concave downward. Since the slope is descending, the object is slowing down.
 
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