Learning objective
Use elementary vector components to explore flow angle and distinguish models from evidence.
Materials
Protractor, graph paper, calculator, KELONG local simulator.
Learning sequence
- First define the angle relative to a surface normal.
- Compute v × cos θ at several angles with a fixed speed.
- Discuss what the formula cannot predict.
Evidence and assessment
Calculation table, plot and three limits of the simulation.
Safety and ethics
Never use classroom outputs for real kelong load or siting decisions.