Grade 11
Physical Sciences — Physics
0/11 Topics completed
Mechanics
- 01Newton’s lawsN1 inertia, N2 F_net = ma, N3 action-reaction, and resolving forces on slopes.
- 02Universal gravitationNewton’s law of universal gravitation and weight vs mass.
- 09FrictionStatic friction f_s ≤ μ_s N can prevent motion. Kinetic friction f_k = μ_k N opposes sliding. Always parallel to the surface, opposite the attempted motion.
- 10Forces in two dimensionsResolve each force into x and y. ΣF_x and ΣF_y separately. Resultant from Pythagoras and tan⁻¹.
Electricity
- 03Coulomb’s law & fieldsF = k Q₁ Q₂ / r² and E = F/q = k Q / r².
- 04Electric circuits: Ohm’s law and powerOhm’s law V = IR, ohmic and non-ohmic conductors, series and parallel resistors, power P = VI = I²R = V²/R, and energy and cost in kWh.
- 08Electric fieldsE as force per unit charge, field lines, and the uniform field between oppositely charged parallel plates E = V/d.
- 11Electrostatics: charge & CoulombCharge is quantised in e = 1.6×10⁻¹⁹ C. Conservation. Coulomb’s law F = k Q₁Q₂ / r² with k = 9×10⁹.