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ASVAB · Physics

Which of Newton's laws states that for every action there is an equal and opposite reaction?

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Correct answer

Newton's third law

  1. A Newton's third law
  2. B Newton's first law
  3. C The law of gravity
  4. D Newton's second law

Why this is the answer

Newton's third law of motion states that for every action there is an equal and opposite reaction — when one object exerts a force on a second, the second exerts an equal force in the opposite direction on the first. A rocket pushing exhaust down and being pushed up is a classic example. Newton's first law is the law of inertia (objects keep their motion unless acted on by a force); the second law relates force, mass, and acceleration (F = ma). Knowing all three laws and an example of each is common General Science content.
Source: ASVAB GS, Newton's Laws

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About this topic: Physics

Physics questions cover motion, forces, Newton's laws, energy, heat, sound, light and basic electricity. Units and simple relationships (speed = distance ÷ time, F = ma) are tested more than calculation. This is one of 15 General Science questions on physics, each with a full explanation on a single study page.

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