Gravity

• Gravity field definition

  a region of space in which masses experience a gravitational force
• Gravitational field strength

  The force per unit mass experienced by a small test mass placed in the field.
• uniform fields

  gravitational field strength is the same at all points
• Newtons law of gravitation

  The force between two point masses is directly proportional to the product of the masses and inversely proportional to the square of the separation between them
• keplars first law

  the orbit of a planet is an ellipse with the sun at one focus
• Kepler's Second Law

  As a planet moves around its orbit, it sweeps out equal areas in equal times
• Keplar's Third Law

  Where the centripetal force and the gravitational force is equal, r^3 is proportional to T^2
• geostationary orbit

  type of orbit that allows a satellite to stay in position above Earth's surface
• Gravitational potential


  Work done per unit mass to bring a mass from infinity to a point in the field