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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

  1. 1:1
  2. 2:1
  3. 3:2
  4. 1:2


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=20020=10 ms1
Velocity from t=2 sec to t=6 sec is given by
v2=02062=5 ms1 ( direction gets reversed)
 Ratio of magnitudes of velocities =v1v2=105=2:1

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