Question

A boy starts from a point $\text{O}$ and travels $50\text{m}$ in $30\text{s}$. He returns to the same point in $20\text{s}$. Calculate the average velocity of the boy.

• A. 0

Answer 1

The correct option is A 0
Since the boy starts from point $\text{O}$, and returns to the same point, the total displacement of the boy is $0\text{m}$.
As we know,

$\text{Average velocity}$

$=\frac{\text{Total displacement}}{\text{Total time}}$

$\text{v}=\frac{0}{30+20}=0{\text{m s}}^{-1}$

Therefore, the average velocity of the boy is zero.