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: (A) 0, 0 (B) 0, 10 m/s (C) 10 m/s, 10 m/s (D) 10 m/s, 0

Given

Radius = 100 m

Time interval = 62.8 seconds

On a circular path in completing one turn, the distance travelled is 2πr while the displacement is zero

Therefore,

Average velocity = (displacement)/(time interval)

= 0/t

= 0

Average Speed = (distance)/(time interval)

= 2πr/t

On substituting values, we get,

= (2 x 3.14 x 100) / 62.8

= 10 ms-1

Hence,

For each circular lap, the average velocity is zero and average speed is 10 ms-1 respectively

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