Question

A race car accelerates uniformly from $18.5m/s$ to $46.1m/s$ in $2.47$ seconds. Determine the acceleration of the car. (in $m/s^2$)

• A. $11.2m/s^2$
  
• B. $11m/s^2$
  
• C. $1.2m/s^2$
  
• D. $51.2m/s^2$
  

Answer 1

The correct option is A $11.2m/s^2$

Initial velocity of the car $u=18.5m/s$
Final velocity of the car $v=46.1m/s$
Time taken $t=2.47s$
Acceleration of the car $a=\frac{v-u}{t}$
$⟹a=\frac{46.1-18.5}{2.47}=11.2m/s^2$