A boy runs along a circular track of radius 7 meters. If he completes one full round in 22 seconds, calculate his average speed and the magnitude of his average velocity for this round.
BiologyClass 9CBSEAnswered 13 May 2026
Answer
For one full round:
Distance covered = Circumference = 2πr = 2 * (22/7) * 7 m = 44 meters.
Time taken = 22 seconds.
Average Speed = Distance / Time = 44 m / 22 s = 2 m/s.
For one full round, the boy returns to his starting position. Therefore, his displacement is zero.
Average Velocity = Displacement / Time = 0 m / 22 s = 0 m/s.
The magnitude of his average velocity is 0 m/s.
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