Physics · GRAVITATION

A satellite of mass \( m \) is orbiting in a circular orbit of radius \( r \) around a planet of mass \( M \). What is the ratio of its kinetic energy \( K \), potential energy \( U \), and total mechanical energy \( E \)?

1. A
   \( -1 : 2 : 1 \)
2. B
   \( 1 : 2 : -1 \)
3. C
   \( 2 : -1 : 1 \)
4. D
   \( 1 : -2 : -1 \)