Physical Sciences Master Pack

Physics + Chemistry

🎓 Grade 12 (NSC / IEB)⏱ 48 hours of content📄 PDF workbook🎥 Video lessons📱 Phone / laptop

Physical Sciences taught the way examiners want it answered. Every mechanics, waves, electricity, organic chemistry and stoichiometry topic is broken down into short lessons with the exact CAPS-required layout, definitions and formulae. Includes 10 years of DBE past papers with mark-by-mark memos.

What's inside this pack

✓140-page PDF study guide
✓10 years of past papers + memos
✓10 hours of video lessons
✓Practical experiment walkthroughs
✓Bonus: memorable mnemonics pack

Sample lessons — read before you buy

4 previews

1Lesson 1 — Newton's Laws in Action

Newton's second law: F_net = m·a. When you resolve forces along an inclined plane at angle θ, gravity splits into mg·sinθ (along the slope, driving motion) and mg·cosθ (perpendicular, giving the normal force). For a 5 kg block on a frictionless 30° slope: F_net = 5 · 9.8 · sin30° = 24.5 N, so a = 4.9 m/s² down the slope. Golden rule for full marks: always draw the free-body diagram BEFORE writing equations.

2Lesson 2 — Momentum & Impulse

Impulse Δp = F·Δt = m·Δv. A 0.15 kg cricket ball moving at 40 m/s is caught in 0.05 s. Change in momentum = 0.15 · (0 − 40) = −6 kg·m/s. Average force on the hand = −6 / 0.05 = −120 N. The negative sign means the force acts opposite to the ball's motion. Conservation of momentum applies only when the system is isolated (no external net force).

3Lesson 3 — Organic Chemistry: IUPAC Naming

Naming rules in order: (1) find the longest carbon chain containing the functional group, (2) number so the functional group gets the lowest locant, (3) name substituents alphabetically. Example: CH₃-CH(CH₃)-CH₂-CH₂-OH → 4 carbons in the main chain, OH on C1 → 3-methylbutan-1-ol. Alcohols end in -ol, ketones in -one, carboxylic acids in -oic acid.

4Lesson 4 — Stoichiometry & Limiting Reagent

For 2H₂ + O₂ → 2H₂O, given 4 mol H₂ and 1.5 mol O₂: the required ratio is 2:1, so 1.5 mol O₂ needs only 3 mol H₂. H₂ is in excess (1 mol excess), O₂ is the limiting reagent. Water produced = 2 · 1.5 = 3 mol = 54 g. Always identify the limiting reagent before calculating product mass.

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