In planetary motion the line from the star to the planet sweeps out equal areas in equal times.This is a direct consequence of:
A)the conservation of energy
B)the conservation of momentum
C)the conservation of angular momentum
D)the conservation of mass
E)none of the above

Question

Quizplus · Accepted Answer

The conservation of angular momentum is responsible for the law that states that the line from the star to the planet sweeps out equal areas in equal times. Angular momentum is conserved because there are no external forces acting on the system.

In Planetary Motion the Line from the Star to the Planet