Nia throws a heavier ball to Farid while they both stand on a frozen pond. What happens to Nia when she throws the ball to Farid?
Make your response very short.
When Nia throws the heavier ball to Farid, she will move backward. According to Newton's third law of motion, every action has an equal and opposite reaction. When Nia applies a force to the ball in the direction of Farid, the ball applies an equal and opposite force to Nia. Since they are standing on a frictionless surface like ice, this opposite force will cause Nia to move backward.