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On the figure below is shown a space ship going in an elliptical orbit around the earth. Take the origin of your coordinate system to be at the center of the earth.

On a copy of the figure on your paper, draw vectors representing the position of the space ship when it is at A and B; the velocity of the space ship when it is at A and B; the acceleration of the space ship when it is at A and B. Draw your vectors so that each type of vector can be distinguished. Be sure to give a legend that shows how each type is being represented. Have you drawn the velocity vector at A longer, shorter, or the same length as the one at B? Explain why. Have you drawn the acceleration vector at A longer, shorter, or the same length as the one at B? Explain why you have done so.

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Page last modified October 15, 2002: GR06