Posted by **Anne** on Tuesday, November 22, 2011 at 3:52pm.

Assume that the earth is a uniform sphere and that its path around the sun is circular.

a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 109 J.

b)Calculate the kinetic energy that the earth has because of its motion around the sun.

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