...Gravitation

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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.

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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 potential energies at A and B ? Kinetic energies? 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.

The force exerted by the Sun on a solar system planet is

a universal constant

the same for all planets

proportional to the mass of the Sun

all of above





Below is a space for your thoughts, including general comments about today's assignment. What was hard or confusing (or cool)? What would you like to spend extra time on in class? Do you see how this subject fits in with the others we have discussed?




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

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