Question

A truck and a car moving with same kinetic energy are stopped by equal retarding force. Which of them will be stopped in shorter distance?

• A. Truck
• B. Car
• C. Both simultaneously
• D. Data not sufficient

Answer 1

The correct option is C Both simultaneously

Kinetic energy lost by both before coming to rest is same. Also the retarding force is same.
From work energy theorem,
$\Delta KE=F\times s$
Since, $\Delta KE$ and F are same, so s is same.