Gravitation — Class 11 Maharashtra HSC Physics revision notes
A 5-page visual revision sheet for Gravitation, written for Class 11 Maharashtra HSC Physics. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Gravitation sheet covers
- Kepler's three laws
- The universal law of gravitation
- force between two point masses
- universal gravitational constant
- Measuring G, the Cavendish balance
- Acceleration due to gravity
- at the surface
- at height h above the surface, h ll R
- at depth d below the surface
- Why g isn't quite constant everywhere
- g at a height above the surface
- Gravitational potential energy
- of a mass m at distance r from mass M
- at infinite separation, by convention
- near the surface, small height h
- Gravitational potential
- Escape velocity, from energy conservation
- Escape and orbital speed
- escape velocity
- for Earth, numerically
- orbital (critical) velocity at radius r
- Launching a satellite needs two stages
- Energy of an orbiting satellite
- Weightlessness, the lift argument
- Free fall and orbit are the same case
- cable cut, downward acceleration equals g
- orbiting satellite, centripetal acceleration equals g at that height
- Time period of a satellite
- circular orbit, radius r = R+h
- in terms of g at that height
- minimum period, close to the surface, r ≈ R
- Geostationary vs polar satellites
- Geostationary
- Polar
- Symbols
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Physics chapter by chapter against your real exam dates and free hours, and when the plan reaches Gravitation the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.