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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a
50 m/s
b
70 m/s
c
10 m/s
d
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