Cambridge IGCSE·Co-ordinated Sciences 0654·Physics Forces Hooke S Law

📋Key knowledge — Forces

Formulas & equations

Weight = mass × gravitational field strength (W = mg)
Newton's 2nd law: F = ma
Moment = force × perpendicular distance from pivot
Pressure = force ÷ area (P = F/A)
Hooke's law: F = kx (extension proportional to force, up to elastic limit)
Momentum = mass × velocity (p = mv)
Impulse = force × time = change in momentum (Ft = Δmv)

Key facts & rules

Newton's 1st law: object stays at rest or constant velocity unless acted on by a net force.
Newton's 3rd law: every action has an equal and opposite reaction (different objects, same type of force).
Terminal velocity: when drag force = weight → net force = 0 → constant velocity.
Principle of moments: for equilibrium, sum of clockwise moments = sum of anticlockwise moments.
Centre of gravity: point where weight acts. Lower CG = more stable.
Friction: force opposing relative motion between surfaces.

IGCSE Physics — Forces & Hooke's law

10 Cambridge IGCSE 0654 questions on forces & hooke's law, across all three components.

About forces & hooke's law on IGCSE 0654

Every Cambridge IGCSE Co-ordinated Sciences 0654 question on forces & hooke's law (Forces, Physics), across all three exam components. Theory and alternative-to-practical come with full mark schemes; multiple choice is interactive — click an option to check it.