Question

A body completes one round of a circle of radius R in 20 seconds. The displacement of the body after 65 seconds is

Answer 1

Explanation:

After 20 sec the body returns at point A and again after 40 sec the body returns at point A. In 5 sec, the body completes quarter of circle. Therefore, The body will be at B after 45 sec. Hence, The displacement of the body after 45 second is .