What are the 3 laws of motion?

• A. Gravity; Mass; Force
• B. Inertia; Momentum; Energy
• C. Inertia; Acceleration; Action/Reaction
• D. Speed; Velocity; Momentum

Answer: (C)

Newton’s motion laws describe how objects respond to forces and interactions. The first law highlights inertia: an object tends to keep doing what it’s doing—staying at rest or moving with constant velocity—unless a net external force changes that state. The second law shows how force affects motion: the acceleration of a body is proportional to the net force and inversely proportional to its mass, summarized by F = ma. The third law captures action and reaction: forces come in equal and opposite pairs, acting on two different bodies, so one body pushes and the other pushes back with the same strength in the opposite direction. When you see the trio listed as inertia, acceleration, and action/reaction, it lines up with how these laws are commonly taught. The other options mix related ideas (like gravity, momentum, energy, speed, and velocity) that aren’t the three fundamental laws themselves.