🛠 Forces & Newton’s Laws

Key Concepts

Newton's First Law: An object at rest stays at rest; an object in motion stays in motion — unless acted on by an unbalanced force (inertia).

Newton's Second Law: Force = mass × acceleration (F = ma). A larger force on the same mass causes greater acceleration. The same force on a larger mass causes less acceleration.

Newton's Third Law: For every action there is an equal and opposite reaction. A rocket pushes gas backward; the gas pushes the rocket forward.