Action-reaction And Momentum Conservation Worksheet Answer Key Apr 2026

8 − 6 = 5 v f ​

p i ​ = p f ​

v f ​ = 0.4 m/s

2 ( 4 ) + 3 ( − 2 ) = ( 2 + 3 ) v f ​

According to Newton’s third law of motion, every action has an equal and opposite reaction. This means that when two objects interact, they apply forces to one another that are equal in magnitude and opposite in direction. These forces are known as action-reaction forces. 8 − 6 = 5 v f ​ p i ​ = p f ​ v f ​ = 0

m 1 ​ v 1 i ​ + m 2 ​ v 2 i ​ = ( m 1 ​ + m 2 ​ ) v f ​

In conclusion, action-reaction forces and momentum conservation are fundamental concepts in physics that help us understand the behavior of objects in motion. By using the law of momentum conservation and understanding action-reaction forces, we can solve problems related to collisions, explosions, and other interactions between objects. m 1 ​ v 1 i ​ +

Here are some sample problems and their solutions:

15 = 5 v 1 f ​ − 10

For example, when a tennis player hits a ball with a racket, the racket exerts a force on the ball (action), and the ball exerts an equal and opposite force on the racket (reaction). This action-reaction force pair is what allows the ball to move in a specific direction.