Question

In the displacement ($d$) - time ($t$) graph given below, the value of average velocity in the time interval $0$ to $20\text{s}$ is (in $\text{m/s}$)

• A. $1.5$
• B. $4$
• C. $1$
• D. $2$

Answer 1

The correct option is A $1.5$

Neglect curve beyond $t=20\text{s}$.
Displacement from $t=0$ to $t=20\text{s is}30\text{m}$. (From graph)
$\Rightarrow \text{Average velocity}=\frac{\text{Displacement}}{\text{Time}}=\frac{30}{20}=1.5\text{m/s}$