Question

A car travels with a speed of 40 km/h from a point P to another point Q. Then it
comes back following the same path to P with a speed of 60 km/h from Q. Find

i )The average velocity.
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Answer 1

Total displacement from point P to Q and Q to P =0

$average\: velocity=\frac{displacement}{total \:time}$

$average\: velocity=\frac{0}{total\:time}$

$average\:velocity=0$

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Answer 2

Average velocity is 0.........