Question

If two bodies named A and B exert force \(F_{AB}\) and \(F_{BA}\) on each other, the expression \(F_{AB} = -F_{BA}\) signifies which law?

• A. Newton's law
• B. Bernoulli's Principle
• C. Boyle's law
• D. Kepler's law

Hint:

Newton's Third Law is the "action-reaction" law. If you push on a wall (action), the wall pushes back on you with an equal force in the opposite direction (reaction). This is why \(F_{AB} = -F_{BA}\).

Answer 1

The Correct Option is A

Step 1: Analyze the equation. The equation \(F_{AB} = -F_{BA}\) states that the force exerted by body A on body B (\(F_{AB}\)) is equal in magnitude and opposite in direction to the force exerted by body B on body A (\(F_{BA}\)).

Step 2: Identify the corresponding law. This is the precise mathematical statement of Newton's Third Law of Motion. The law is often stated as: "For every action, there is an equal and opposite reaction."

Step 3: Evaluate other options. Bernoulli's principle relates to fluid dynamics. Boyle's law relates pressure and volume of a gas. Kepler's laws describe planetary motion.
Conclusion: The expression signifies Newton's law (specifically, his Third Law).