Question

A Porsche can go from $0\text{km/hr}$ to $100\text{km/hr}$ in $10\text{s}$. What is its average acceleration?

• A. $2.77\text{m}/s^2$
• B. $3.66\text{m}/s^2$
• C. $-3.66\text{m}/s^2$
• D. $0\text{m}/s^2$

Answer 1

The correct option is A

$2.77\text{m}/s^2$

$100\text{km/hr}$ = $\frac{1000}{36}m/s$

$\therefore$ average acc =$\frac{\frac{1000}{36}-0}{10}\text{m}/s^2$

= $\frac{100}{36}=2.77\text{m}/s^2$