A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is

Question

Quizplus · Accepted Answer

The force needed to stop an object is related to its momentum, which is the product of its mass and velocity. Since the truck has a greater mass than the car, it has more momentum at the same speed, requiring a greater force to stop it in the same amount of time.

A Heavy Truck and a Small Car Rolling Down a Hill