Question

give an example in which average speed is not zero but average velocity is zero.explain it

Answer 1

a journey from Bangalore to Hindupur and again back to hindupur

Answer 2

Hey mate !!

Here's the answer !!

We know that,

Average speed = Total Distance / Total Time

But in any case Distance will never be zero. Hence Average speed will never be zero.

Average Velocity = Displacement / Time

We know that displacement is the shortest distance between two points. Hence Displacement can be zero or need not be zero.

But if displacement is zero, then average velocity is zero. Because

Average Velocity = 0 / Time = 0

Hence it can be zero.

Illustration :

A person runs a circular ground of 500 m in 25 seconds.Both the starting point and ending point are the same. Now let's calculate the Average Speed and Velocity in this case.

Average speed = Total distance / Total time

=> Average Speed = 500 m / 25 seconds = 20 m / sec

Hence Average speed = 20 m / sec which is not equal to zero.

Average Velocity = Displacement / time

=> Average Velocity = 0 / 25 seconds = 0 m / sec

Displacement is zero in this case because the starting point and ending point are the same. Hence the shortest distance is zero in this case. Hence Average Velocity is 0.

Hope my answer helped !!

Cheers !!