Question

A body goes from A to B with a velocity of 20 m/s and comes back from B to A with a velocity of 30 m,'s
The average velocity of the body during the whole loumey is
(1) zero
(2) none of these

Answer 1

Answer:

Average velocity is zero because no displacement occurred..

Explanation:

Answer 2

$\color{darkblue}\underline{\underline{\sf Given-}}$

• Body goes from A to B with velocity 20m/s and then come back from B to A

$\color{darkblue}\underline{\underline{\sf To\:Find-}}$

• Average Velocity

We know that

$\large\color{violet}\bullet\underline{\boxed{\sf V_{av}=\dfrac{Displacement}{Time}}}$

Displacement is Shortest Distance Travelled by an Object.

and , here displacement will be zero.

Because Object has started from point A and then finally come back to point A.

Therefore Displacement will be zero.

If displacement will be zero then average velocity will obviously be zero.

$\color{red}\implies{\sf v_{av}=0 }$

$\color{darkblue}\underline{\underline{\sf Answer-}}$

Option (1) zero

Average velocity of the body during whole journey is $\color{red}{\sf zero}$.