G Fields

• Equipotential

  A plane of points with equal gravitational potential. The work done travelling on an equipotential is zero.
• Geostationary Orbit

  An orbit with a time period of one day and stay over one point on the earth’s surface. They are directly above the equator and travel in the same direction as the earth’s rotation.
• Gravitational Field

   A region of space where objects with mass experience an attractive force due to gravity.
• Gravitational Field Strength

  The gravitational force on an object divided by its mass, it is the acceleration due to the gravitational field.
• Gravitational Potential

  Defined at a point. The amount of work done in moving a unit mass from an infinite distance to that point.
• Low Orbit

   An orbit with a height between 160 km and 2000 km.

   
•  Newton’s Law of Gravitation

   Force of gravity is proportional to the product of the masses involved and inversely proportional to the square of the separation of the masses.
• Synchronous Orbits

   A orbit with a time period of one day so will return to the same point in the sky each day.