# ORBIT...

Classical Mechanics Level 3

For a satellite revolving around the earth in circular orbit which of the following is $$always$$ true.. Given U is taken zero at infinity Where
$$E$$ is total energy of satellite
$$U$$ is gravitational potential energy of satellite
$$K$$ kinetic energy of satellite

1. $$K = -E$$
2. $$K = U/2$$
3. $$K = -U/2$$
4. $$E = U/2$$
5. $$2U = E$$
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