Newton's Laws of Motion Flashcards

Grade 9 · Science · Flashcards

Review key terms and concepts for Newton's three laws of motion with these 12 flashcards.

Flashcards

Newton's First Law: Law of Inertia: an object at rest stays at rest and an object in motion stays in motion unless acted on by a net external force.
Newton's Second Law: F = ma; the net force on an object equals its mass multiplied by its acceleration.
Newton's Third Law: For every action force there is an equal and opposite reaction force acting on a different object.
Inertia: The resistance of an object to any change in its motion; directly proportional to mass.
Force: A push or pull on an object; measured in Newtons (N); can change an object's speed or direction.
Net Force: The vector sum of all forces acting on an object; determines actual acceleration.
Mass: The amount of matter in an object; measured in kilograms (kg); determines inertia.
Acceleration: Rate of change of velocity (m/s²); produced by a net force.
Newton (N): SI unit of force; 1 N = 1 kg·m/s².
Action-Reaction Pair: Two forces that are equal in magnitude and opposite in direction, acting on two different objects.
Friction: A force opposing relative motion between surfaces; an example of a net force that causes deceleration.
Equilibrium: State where net force = 0; the object is at rest or moving at constant velocity.