Monday, 20 October 2014


  1. Suppose that a satellite always stays directly above the same spot on Earth’s equator. Find the period of revolution of the satellite in SI units.
  2. Find its angular velocity.
  3. Using GMm/r² and mω²r, write down an equation relating the gravitational and centripetal forces on the satellite. Explain.
  4. Rearrange this equation to make r the subject.
  5. Find r. Find the height of the satellite above the equation. Mass of Earth is 5.97x1024 kg.
  6. How many times is this distance bigger than the 6380 km radius of the Earth.
  7. What is the name of this type of satellite?