# Physics

posted by on .

Which of Newtons laws would best explain what causes a basketball to bounce?
first
second
third
fourth

which of Newtons laws would explain the whiplash caused by being rear ended in a car accident?
first
second
third
fourth

I believe the answer to number one is the second law because it talks about gravity and the answer to number 2 is the third because it deals with all forces come in pairs but I need someone who really knows to check

• Physics - ,

The basketball hits the floor. It exerts a force on the floor equal and opposite to the force exerted by the floor on the basketball. I would say third law.

When your car is rear ended, the momentums of your car and of you change suddenly. That rapid change of momentum requires a force, which your neck transmits to your head. Your neck may not be strong enough to change the momentum of your head quickly enough to keep up with the car, and is injured as the head falls behind the rest of the body. Force = rate of change of momentum is Newton's second law.