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 that stops the car, the force needed to stop the truck is

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Quizplus · Accepted Answer

According to Newton's second law of motion, F = ma, where F is the force applied, m is the mass of the object, and a is the acceleration. Since the truck has a greater mass than the car, it will require a greater force to stop it in the same amount of time. Therefore, the force needed to stop the truck is greater than the force needed to stop the car.

A Heavy Truck and a Small Car Rolling Down a Hill