A heavy truck and a small car roll down a hill at the same speed and need 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 directly proportional to its mass. Since the truck is heavier than the car, it has more mass and hence more force is required to stop it in the same amount of time. Therefore, the force needed to stop the truck is greater than that needed to stop the small car.

A Heavy Truck and a Small Car Roll Down a Hill