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