| The
total energy of the planet must remain constant.
Etotal = Ekinetic
+ Epotential
As the planet moves from point A to point B,
the planet moves farther away from the star the potential energy must increase.
The increase in potential energy is equal to the work necessary to
accomplish the change.
To maintain the same total energy the kinetic
energy must decrease. This also means that the velocity of the
planet must decrease.
The Correct Answer is B. |
