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An old person moves on a semi circulasr ...

An old person moves on a semi circulasr track of radius 40.0 m during a moirning walk. If he starts at one end of the track and reaches at the other end, find the distance covered and the displacement of the person.

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The distance covered by the person equals the length of the track. It is equal to `piR = pi xx40.0m=126m`.
The displcement is equal to the diameter of the semi circular track joining the two ends. Ilt is `2R=2xx40.0m=80m`. The direction of this displacement is from the initial point to the final point.
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HC VERMA-REST AND MOTION : KINEMATICS-Exercises
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