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Question

For the displacement-time graph shown in figure, the ratio of the magnitudes of the velocities during the first two second and the next four second is


A
1 : 1
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B
2 : 1
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C
1 : 2
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D
3 : 2
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Solution

The correct option is B 2 : 1
Slope of displacement-time graph represents velocity.
Velocity from t=0 sec to t=2 sec is given by
v1=202 ms1
Velocity from t=2 sec to t=6 sec is given by
v2=204 ms1 ( direction gets reversed)
Ratio of magnitudes of velocities =v1v2=105=2:1

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