Question

Vishnu swims in a 70m long pool. He covers 140m in one minute by swimming from oneend to the other and back along the same straight path. Find the average speed and average velocity of Vishnu.

Answer 1

total distance covered by Vishnu=140m

total displacement=0

(As displacement is the shortest distance between the initial and the final position here the initial and final position is the same hence displacement is zero)

time taken=1 min=60sec

Average speed

=total distance/total time

=140/60

=2.33m/s

Average velocity

=total displacement /total time

=0/60

=0