Fields and orbits
KS5 · 40 minutes · Use gravitational and electric field laws.
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Our learning goal
Use gravitational and electric field laws.
Your turn: Choose one thing you would like to understand by the end.
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My lesson notes & project
Full teaching script
- Today: Fields and orbits. Our goal: Use gravitational and electric field laws.
- Take one idea at a time. Pause after each sentence; ask for repetition whenever you need it.
- Both obey inverse-square laws: g = GM/r², E = kQ/r². Circular orbits need centripetal force supplied by gravity, giving v = √(GM/r) — so lower orbits are faster. Geostationary orbit sits where the period is one sidereal day.
- Together: choose one example from the explanation and show how it works. What do you notice?
- Your turn: Derive the geostationary radius from first principles.
- Reflect: what made sense, and what would you like explained differently?
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