Question

A free-falling golf ball strikes the ground and exerts a force on it. Which sentences are true about this situation?

1. a golf ball striking the ground is a collision
2. the ground exerts an equal force on the golf ball
3. the ground doesn't exert a force on the golf ball
4. the force is zero because the golf ball has little mass

You can pick multiple answers

Answer 1

Number 2 because if you have and action and you will get an opposite reaction.

Answer 2

1. a golf ball striking the ground is a collision

2. the ground exerts an equal force on the golf ball

Step-by-step explanation:

1. a golf ball striking the ground is a collision

That is certainly a collision because the two bodies here exert a contact force on each other for a relatively short time.

2. the ground exerts an equal force on the golf ball

According to Newton's Third Law when body A exerts a force on body B then B exerts an equal but opposite force on A. So the ground exerts an equal (in magnitude) but opposite (in direction) force on the ball