Question 1: Define action force and reaction force as described by Newton's Third Law.

Answer: An action force is the force exerted by one object on another, and the reaction force is the force exerted back by the second object on the first, equal in magnitude and opposite in direction.

Question 2: Explain why action and reaction forces always act on different objects, not the same object.

Answer: Because Newton's Third Law states that the forces are equal and opposite but act on different objects, ensuring they do not cancel each other out within the same object.

Question 3: Describe an example of action-reaction forces in everyday life.

Answer: When a person pushes against a wall, the wall pushes back with an equal and opposite force, which is an example of action-reaction.

Question 4: Identify the variables involved in the force exerted by a rocket engine during launch.

Answer: Variables include the mass of the rocket, the rate of fuel expulsion, and the velocity of the exhaust gases.

Question 5: Calculate the force exerted if a person pushes a box with a force of 50 N to the right. What is the reaction force?

Answer: The reaction force is 50 N to the left.

Question 6: A swimmer pushes against the water with a force of 200 N. What is the force exerted by the water on the swimmer?

Answer: 200 N, in the opposite direction.

Question 7: Multiple Choice: Which of the following best illustrates Newton's Third Law?

Answer: A person jumping off a boat and pushing it backward

Question 8: Fill in the blank: When a hammer strikes a nail, the force exerted by the hammer on the nail is the ____, and the force exerted by the nail on the hammer is the ____.

Answer: action; reaction

Question 9: Explain how action-reaction forces are involved when a swimmer pushes off the wall of a pool.

Answer: When the swimmer pushes against the wall, they exert an action force on it. According to Newton's Third Law, the wall exerts an equal and opposite reaction force on the swimmer, propelling them forward in the water.

Question 10: Describe a safety precaution that should be considered when studying forces involving pushing or pulling objects.

Answer: Ensure that the objects are secure and that proper lifting techniques are used to prevent injury from sudden movements or falling objects.

Question 11: Discuss a real-world application where understanding action-reaction forces is crucial in engineering or technology.

Answer: In rocket engineering, understanding the action-reaction principle is vital for designing engines. The expulsion of exhaust gases (action) produces an equal and opposite force (reaction) that propels the rocket forward. This principle is fundamental for space travel.