Question

1. A body moving along a circular track of radius R completes one rotation in 2 seconds. Its average velocity in 2 second is ___m/s.
(i) 0
(ii) 2
(iii) 3
(iv) 10​

Answer 1

Given,

The body completes one rotation of radius R in 2 seconds.

To Find,

The average velocity of the body.

Solution,

The formula for calculating the average velocity of a body is

Average velocity = total displacement/ total time taken

In this case,

The displacement of the body is 0 because the start point and the endpoint of the body are the same.

Total time taken = 2 seconds

So,

Average velocity = 0/2 = 0 m/s

Hence, the average velocity of the body is 0 m/s.