Question

10. An athlete finishes a round
of circular track of radius R in
40 sec. What is his
displacement at the end of 2
min 20 sec?​

Answer 1

Explanation:

So in so seconds athlete would have completed half of the track for which he takes 40s to complete. This means he will be at the opposite side of the diametre from where he started. Thus, his displacement would be 2R which is the diametre of the circle.