Velocity - time (v−t) graph for a moving objects is shown in the figure. Total displacement of the object during the time intervals when there is non-zero acceleration, is
A
60m
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B
50m
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C
30m
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D
40m
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Solution
The correct option is C50m Between time interval 20s to 40s, there is non-zero acceleration and retardation. Hence, distance travelled during this interval. = Area between time interval 20s to 40s =12×20×3+20×1=30+20=50m.