Kepler's First Law of Planetary motion

Front

What are the two points around which an ellipse is drawn?

Back

Foci

Front

What happens to the eccentricity of an ellipse as the distance between the foci increases?

Back

It increases.

Front

What does Kepler's First Law state?

Back

Planets travel in an ellipse.

Front

Which diagram represents a planet with the least eccentric orbit?

Back

Diagram 1.

Front

If the distance between the foci is 6 cm and the length of the major axis is 10 cm, what is the eccentricity?

Back

0.600

Front

Define eccentricity in the context of an ellipse.

Back

Eccentricity is a measure of how much an ellipse deviates from being circular.

Front

What is the formula for calculating eccentricity (e) of an ellipse?

Back

e = c/a, where c is the distance from the center to a focus and a is the distance from the center to a vertex.

Front

What is the major axis of an ellipse?

Back

The longest diameter of the ellipse, passing through both foci.

Front

What is the minor axis of an ellipse?

Back

The shortest diameter of the ellipse, perpendicular to the major axis.

Front

What is the significance of the foci in an ellipse?

Back

The sum of the distances from any point on the ellipse to the two foci is constant.