Question

What is the acceleration of a van that starts from rest and attains a speed of $20\frac{m}{s}$ in 25 seconds?

• A. 2 m/s²
• B. 0.8 m/s²
• C. 7.5 m/s²
• D. 4 m/s²

Answer 1

The correct option is B

0.8 m/s²

$v=u+at$

$\text{Here,}$

$u=0,v=20\frac{m}{s},t=25s$

$\therefore 20=0+a\times 25$

$\Rightarrow a=\frac{20}{25}$ $\frac{m}{s^2}$

$=0.8\frac{m}{s^2}$