A car runs at constant speed on a circular track of radius 10m taking 6.28s on each lap. The average speed and average velocity on each complete lap is
A
Velocity 10m/s, speed 10m/s
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B
Velocity 0, speed 10m/s
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C
Velocity 0, speed 0
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D
Velocity 10m/s, speed 0
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Solution
The correct option is B Velocity 0, speed 10m/s Since after each lap the position of the car is same as initial so the average velocity will be zero. Total Distance =2πr=2×3.14×10=62.8m Total time =6.28s Average speed =dt=62.86.28=10m/s