1.

an athelete completes one round of circular track of radius in 40 sec what will be his displacement at the end of 2 minute 20sec

Answer»

In first 2 MINUTES it returns to its initial position as it completes 3 revolutions. in last 20 SECONDS it completes half of the CIRCLE . HENCE displacement is 2 times the radius of the circle as it is shortest possible path .



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