Velocity-time graph of a particle moving in a straight line is shown in figure, In the time interval from t=0 to t=14 s, find average speed of the partcile?

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50 m/s

70 m/s

10 m/s

850 m/s

answer is C.

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Detailed Solution

Displacement s= net area of v-t graph =40+40+40-20=100 mDistance d=∣Total area∣ =40+40+40+20=140 mAverage speed =dt=14014=10 m/s