Question

Two similar trucks are moving with the same velocity on the road. One is loaded and the other is empty. Which truck will require more force to be stopped?

• A. Loaded truck
• B. Empty truck
• C. Both equal
• D. Can't be predicted

Answer 1

The correct option is A Loaded truck

Force required $|F|=\frac{|\Delta P|}{\Delta t}=\frac{|m(0-u)|}{\Delta t}=\frac{mu}{\Delta t}$

$⟹$ $|F|\propto m$ $(\because u,\Delta t=constants)$

As the loaded truck has more mass compared to the empty one, thus more force is required to stop the loaded truck.