a. If only an external force can change the velocity of a body, how can the internal force of the brakes bring a moving car to rest?

b. A car hurtles off a cliff and crashes on the canyon floor below. Identify the system in which the net momentum is zero during the crash

Answer rating: 100% (QA)

1a It is the force of the road on the tires an external force that stops the car Explanation I... View the full answer