'Every law has an equal and opposite reaction' is the statement of which law?
Correct answer: A. Newton's third law of motion
- A. Newton's third law of motion
- B. Newton's first law of motion
- C. Inertial law
- D. Newton's second law of motion
Explanation
Newton's third law of motion states that 'every action has an equal and opposite reaction'. If a force is applied by body A on body B, body B will apply an equal force on body A. Note that the forces are equal and opposite, but applied on different bodies. Therefore, they do not cancel each other's effect.Newton's first law of motion, also known as the Inertial Law, states that a body stays in its state of rest or uniform motion unless a net force is applied on it.Newton's second law of motion defines force. It states that when a force is applied on a body, it accelerates in the direction of the force. The acceleration is directly proportional to the force but inversely proportional to the mass of the object. Mathematically, F = ma.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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