Question

Kepler's 3 Laws of motion describe orbital motions as ellipses. This question will test your knowledge about ellipses and help you apply Kepler's Laws to elliptical problems.

Part A

Which of the following is true about ellipses?

Check all that apply.

.An ellipse has two focal points.

An ellipse has an oval shape.

An ellipse has the sum of the distances from the focal points to the surface of the ellipse is constant.

A circle is a special kind of ellipse.

Part B

Which of the following statements is true regarding an object traveling in an elliptical orbit?

Check all that apply.

The eccentricity of the orbit refers to the flatness with a lower eccentricity corresponding to a more circular orbit.

The object being orbited is at one of the focal points.

There are solid objects at both of the focal point locations of the ellipse.

The length of the major axis of the ellipse is the average orbital radius for calculation purposes.

The orbiting object's speed varies at it moves around the elliptical orbit.

Part C

A newly discovered asteroid orbiting around the Sun has an eccentricity of 0.292 and a period of 10.97 years . What is the total distance between the two foci for this asteroid? The mass of the Sun is 1.99×10³⁰ kg .

Answer 1

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