In this video, we revise key Grade 8 Technology topics from the CAPS curriculum, focusing on Mechanical Systems and Control and Electrical Systems and Control. This comprehensive revision lesson prepares learners for tests and exams by explaining definitions, diagrams, and applications step-by-step.
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⚙️ Section A: Mechanical Systems and Control
Learn about moving parts, force transmission, and mechanisms.
We cover:
Matching Terms: Gears, Pulleys, Torque, Friction, Levers, and Brake Types (Rim & Disc).
Gears: Labeling Spur Gears (Driver, Driven, Mash, and Gear Teeth).
Multiple Choice Review:
Gear direction and motion (counter-rotation in spur gears).
Applications (e.g., rack-and-pinion in automatic gates).
Speed vs Force relationship (larger gear = slower speed).
The function of idler gears (change direction of rotation).
Levers: Identifying Fulcrum (F), Load (L), Effort (E), and Lever Classes (1, 2, or 3).
Example: The wheelbarrow is a Class 2 lever.
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⚡ Section B: Electrical Systems and Control
Understand how electrical components, circuits, and safety work in real-life applications.
We cover:
Components & Symbols: Cell, Resistor, Lamp, Motor, and Voltmeter.
Circuit Analysis:
Series circuit with resistors, bulbs, and cells.
Total voltage calculation (4 × 5V = 20V).
Role of resistors in current restriction.
Calculating total resistance (6.7 kΩ).
Circuit Diagrams:
Closed and open circuit drawings.
Illegal Connections:
Definition and social dangers (fire, electrocution).
Causes of power outages and grid overload.
How citizens can reduce the problem (education and reporting).
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This lesson is ideal for:
✅ Grade 8 and Grade 9 learners preparing for Technology exams
✅ Teachers looking for CAPS-aligned revision support
✅ Parents and tutors helping learners with homework and revision
📘 About Proficient School:
Founded by Rudolph Mathumbu, Proficient School delivers clear, CAPS-aligned lessons that make learning simpler, more enjoyable, and effective. We help learners understand, apply, and pass with confidence.
👉 Subscribe to Proficient School for more Technology, Natural Science, and CAPS revision lessons.
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