## gravitational problem

Kepler's second law of motion states that:

"The line drawn from the sun to a given planet sweeps out equal areas in equal times"

This law is really a re-statement of...

1) the fact that the moment of inertia of the planet about the sun is constant.
2)the fact that the energy of the planet is constant.
3)the fact that the planet's mass is constant.
4)the fact that the angular momentum of the planet is constant.
5)the fact that the linear momentum of t