ZIMSEC · Form 3 · Syllabus 4023
Physics
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- Measurement and units Physics depends on accurate measurement in SI units.
- Motion Near the Earth all objects fall with acceleration g ≈ 10 m/s² if air resistance is ignored. With air resistance, a falling object reaches terminal velocity when air resistance equals weight.
- Forces and Newton's laws A force is a push or pull measured in newtons (N). Forces can change an object's speed, direction or shape.
- Moments, pressure and stability Moment = force × perpendicular distance from the pivot (N m).
- Energy, work and power Energy is measured in joules (J). It cannot be created or destroyed, only transferred (conservation of energy).
- Thermal physics Temperature measures the average kinetic energy of particles. Thermometers use a property that changes with temperature (e.g. expansion of mercury or alcohol).