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PRACTICE / Satellite energy

Energy of a circular orbit

A 2 kg satellite moves on a circular orbit of radius 1000 m around a body with GM = 8000 m³/s².

Find its total mechanical energy.

Organize the givens & assumptions
  • m = 2 kg
  • r = 1000 m
  • GM = 8000 m³/s²

Test satellite in a circular orbit about a fixed spherical source; gravitational potential zero at infinity.

  1. A−16 J-16\ \mathrm J
  2. B0 J0\ \mathrm J
  3. C−8 J-8\ \mathrm J
  4. D8 J8\ \mathrm J

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