The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT button at the bottom of this page.

1.

A planet's orbit around the sun is an ellipse. Consider points A and B on the ellipse. How does the centripetal force exerted on the planet at point A compare to the centripetal force exerted on the planet at point B? How about the kinetic energies at A and B? How about angular momenta?

2.

Estimate the force that the Moon exerts on you when it is directly overhead.

(You need some data from the book to answer this question.)

3.

Kepler's third law is a statement of

conservation of energy

conservation of angular momentum

both

neither

You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.

I received no help from anyone on this assignment.

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