Flashcard library · Classical Mechanics
Physics: Newton's Laws of Motion
Master Newton's three fundamental Laws of Motion with this essential flashcard deck. Covering inertia, force, mass, acceleration, and action-reaction pairs, these cards will solidify your understanding of how objects move and interact. Perfect for preparing for tests and deepening your foundational physics knowledge.
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What is Newton's first law?
An object stays at rest or in uniform straight-line motion unless a net external force acts on it.
What is inertia?
An object's tendency to resist changes in its motion; mass measures it.
What is Newton's second law?
F_net = ma: acceleration is proportional to net force and inversely proportional to mass.
What are the SI units of force, mass and acceleration?
Newtons (N), kilograms (kg) and meters per second squared (m/s²).
If the net force on an object doubles at constant mass, what happens to its acceleration?
It doubles.
What is Newton's third law?
If A exerts a force on B, B exerts an equal and opposite force on A.
Why don't action-reaction forces cancel out?
They act on different objects.
What is force?
A push or pull; a vector with magnitude and direction.
What is net force?
The vector sum of all forces on an object — the force in F = ma.
What is acceleration?
The rate of change of velocity; a vector.
What is weight?
The gravitational force on an object: W = mg.
What is the normal force?
The perpendicular push a surface exerts on an object in contact with it.
How do static and kinetic friction differ?
Static friction prevents sliding from starting; kinetic friction opposes sliding already happening.
What is linear momentum?
p = mv, mass times velocity.
What happens to a 10 kg object pushed with a net force of 20 N?
It accelerates at 2 m/s², since a = F/m.