The Speed of a Comet in an Elliptical Orbit About

question 50

Multiple Choice

The speed of a comet in an elliptical orbit about the sun:

• A)decreases while it is receding from the sun
• B)is constant
• C)is greatest when farthest from the sun
• D)varies sinusoidally with time
• E)equals L/(mr), where L is its angular momentum, m is its mass, and r is its distance from the sun

---

Definitions:

Potential Energy

The energy stored within a physical system due to the position, arrangement or state of its constituents, capable of causing movement.

Work

Any change in the state or motion of matter.

Position

The location of something or someone in relation to other objects or individuals.

Endergonic Reaction

A nonspontaneous reaction; a reaction requiring a net input of free energy. Compare with exergonic reaction.