Doubt from Kinematics

rectilinear-motion
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kinematics
easy
pp
#1


Please give me answer of q no. 22 , 23

#2

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#3

For 22, avg. accn. = CHange in velocity / time = 0 - 6 \over 7 = -6 \over 7 units

For 23, distance can be calculating displacements in parts, like from from 0 to 2 seconds (direction of motion changes at 2 seconds), then from 2 to 3 seconds, then 3 to 5 seconds, and finally 5 to 7 seconds, and then adding them.

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