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 journey is

• A. zero
• B. 25 m/s
• C. 24 m/s
• D. none of these

Answer 1

The correct option is A zero

$\text{Average velocity}=\frac{\text{Total displacement}}{\text{Total time}}$
Since, in this case, the particle initial and final points are the same, therefore its Displacement $=0$.
$\therefore \text{Average velocity}=0$