Question

A scooter travelling at $10\text{m/s}$ speed up to $20\text{m/s}$ in $4\text{sec}$. Find the average acceleration of scooter.

• A. $5{\text{m/s}}^2$
• B. $2.5{\text{m/s}}^2$
• C. $2{\text{m/s}}^2$
• D. $4{\text{m/s}}^2$

Answer 1

The correct option is B $2.5{\text{m/s}}^2$

Acceleration of the train is given by
$a=\frac{\Delta v}{\Delta t}$
Here, $\Delta v=(20-10)=10\text{m/s}$
and $\Delta t=4\text{s}$
$\Rightarrow a=\frac{10}{4}=2.5{\text{m/s}}^2$