Q.

A car runs at a constant speed on a circular track of radius 100 m, taking 62.8 seconds for every circular lap. The average velocity and average speed for each circular lap respectively is

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a

10 m/s, 0

b

0, 0

c

0, 10 m/s

d

10 m/s, 10 m/s.

answer is C.

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Detailed Solution

Distance travelled in one rotation (lap) =2πr∴Average speed=distancetime=2πrt=2×3.14×10062.8=10 m s-1Net displacement in one lap=0Average velocity=net displacement time=0t=0
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