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Velocity-time graph of a particle moving...

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

(a) average velocity and
(b) average speed of the particle.

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The correct Answer is:
A, B
Displacement s=net area of v-t graph
`=40+40+40-20=100m`
Distance `d=|"Total area"|`
`=40+40+40+20=140m`
(a) Average velocity=`s/t=100/14=50/7 m//s`
(b) Average speed=`d/t=140/14=10 m//s`
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