Question

A heavy truck moves at $36km/h$. It increases its velocity to $90km/h$ in $0.1\text{minute}$.

What is the acceleration of the truck?

• A. $6.0m/s^2$
• B. $5.5m/s^2$
• C. $3.0m/s^2$
• D. $2.5m/s^2$

Answer 1

The correct option is D

$2.5m/s^2$

Initial velocity of the truck $=36km/h=10m/s$
Final velocity of the truck $=90km/h=25m/s$
Change in velocity of the truck$=25-10=15m/s$
Total time taken$=0.1\text{minute}=6s$
Acceleration$=\frac{15}{6}=2.5m/s^2$