Topic — Universal gravitational force, orbits and motion of celestial bodies.
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08
Linked atoms
67 linked atoms.
08 Universal gravitation
- Altitude of the geostationary orbit
- Weightlessness on the ISS
- ISS astronaut and weightlessness
- Black holes and the Schwarzschild radius
- Falling to the centre of the Earth
- Classification of orbits
- Comet at perihelion and aphelion
- Conservation of angular momentum and Kepler’s second law
- From Kepler to Newton: universal gravity
- Derivation of escape velocity
- Binding energy of a satellite
- Universal gravitational potential energy
- Worked example: two asteroids falling into each other
- Worked example: the Sun’s mass from Kepler
- Worked example: satellite, aphelion and perihelion
- Explosion of a probe
- r³
- Science fiction physics: G doubled
- Sun-Earth gravitational force
- Earth-Moon gravitational force
- Force between two 100 kg spheres
- Escaping the Solar System
- Gravity at different altitudes on Everest
- Gravity on the Moon and an astronaut’s weight
- Surface gravity on the Moon
- Surface gravity on the Moon
- ISS and weightlessness (free fall)
- Newton’s law of universal gravitation
- The hollow Moon
- The apple and the Moon
- Tides: why two a day
- Kepler’s laws
- Graph reading: g(r) inside and outside the Earth
- Mass of an unknown planet
- Maximum and minimum distance from the central body
- Apple and Earth: mutual gravitational forces
- Newton, Hooke and priority of the inverse-square law
- Circular orbit and centripetal force
- Elliptical orbit: perihelion, aphelion and speed variation
- Why the Moon doesn’t fall
- Period of a planet at 2.4 AU
- Period of a satellite at 400 km
- Weight and mass
- Planet from Kepler: star mass, velocity and energy
- Planet between two equal stars: unstable equilibrium
- Connection with mgh near the surface
- Radius of the geostationary orbit
- Radius of a planet
- Ranking the periods of four satellites
- Ranking the surface gravity of three planets
- Ranking orbital velocities
- Ranking gravitational forces
- s²
- Satellites and circular orbits
- Sun, Earth and a car: comparing gravitational forces
- Estimating the radius of the geostationary orbit
- Estimating the mass of the Sun
- Estimating the mass of the Galaxy
- Earth-Mars Hohmann transfer
- An apple and a moon: the invention of the earthly sky
- Escape velocity
- Escape velocity from Earth
- Escape velocity from Earth (energy)
- Speed of a comet at perihelion
- True or false about energy and orbits
- True or false about gravitation