Question

Usha swims in a 90 metre long pool from end to another and back average velocity is​

Answer 1

Answer:

0

Explanation:

This question has purposely not given any other values. Since, Usha swims from end to another that means she comes back to her original position. This means that Displacement is 0.

Velocity = Displacemnt/Time

Here, since Displacement is 0, hence average velocity will also be 0.

Answer 2

Answer:

average speed = zero  while average speed ≠ 0

Explanation:

bcz Vavg = total displacemet / time taken = o / time taken = 0 ms^-1