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Tidal forces arise from gravity gradient: near side attracted more than far side, stretching objects. Governs Moon stability and planetary rings.
Trin-for-trin guide
- 1Input primary mass, satellite mass, separation distance
- 2Calculate tidal force gradient
- 3Compare to self-gravity
Løste eksempler
Input
Earth-Moon system
Resultat
Tidal force sufficient to cause 1m ocean tides
Moon receding ~3.8 cm/year
Almindelige fejl at undgå
- ✕Confusing tidal force with mass effect
- ✕Neglecting density in Roche limit
Ofte stillede spørgsmål
When does tidal force destroy objects?
When exceeds self-gravity: Roche limit. Depends on density, composition.
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