Question

Richard is driving forward and suddenly breaks. Describe what happens to his body

according to Newton's Laws.

Answer 1

Upon sensing a collision the seat belts lock in place. When the car breaks, there is no unbalanced force acting on the person, so they continue forward (Newton's First Law). The person moves against the seat belt, exerting a force on it. The seat belt then exerts a force back on the person (Newton's Third Law).