Question 1: Define Newton's Third Law of Motion in your own words.

Answer: Newton's Third Law states that for every action, there is an equal and opposite reaction.

Question 2: Explain how action-reaction pairs always act on different objects, not the same object.

Answer: Action and reaction forces act on different objects; for example, a book resting on a table exerts a force on the table, and the table exerts an equal and opposite force on the book.

Question 1: A person pushes a box with a force of 50 N. What is the magnitude of the reaction force exerted by the box on the person?

Answer: 50 N

Question 2: A spaceship exerts a thrust of 200,000 N to the left to propel itself forward. What is the force exerted back on the spaceship by the expelled gases?

Answer: 200,000 N

Question 1: Describe a simple experiment to demonstrate action-reaction forces using a skateboard and a wall. Include safety precautions.

Answer: One experiment involves standing on a skateboard facing a wall, then pushing against the wall with your hands. As you push, you move backward, demonstrating action-reaction. Safety precautions include wearing protective gear and ensuring the area is clear of obstacles.

Question 2: Identify two real-world situations where action-reaction forces are crucial for safety.

Answer: Car airbags deploying during a crash and rocket launch thrusters.

Question 1: A swimmer pushes water backward with a force of 300 N. What is the forward force exerted on the swimmer by the water?

Answer: 300 N

Question 2: A rocket expels gases downward with a force of 1,000,000 N. Describe how the action-reaction principle explains the rocket's movement.

Answer: The gases exert an equal and opposite force upward on the rocket, propelling it forward. This exemplifies Newton's Third Law, where the action of gases expelled downward results in an upward reaction force that moves the rocket.

Question 1: How do action-reaction forces enable a swimmer to move forward in water?

Answer: The swimmer pushes water backward with their hands and feet, and the water pushes back with an equal and opposite force, propelling the swimmer forward.

Question 2: In what way do action-reaction forces influence the design of safety features in vehicles?

Answer: Safety features like seat belts and crumple zones are designed to manage and reduce the impact of action-reaction forces during collisions, protecting passengers by controlling how forces are transferred and absorbed.