Kepler's Third Law Relates the Period P and the Semimajor

question 185

Multiple Choice

Kepler's third law relates the period P and the semimajor axis a of an orbit.For a circular orbit,P = 2a/v,so it is possible also to relate the speed v to a.The result is,as a increases:

• A) both P and v increase.
• B) P increases but v decreases.
• C) P decreases but v increases.
• D) both P and v decrease.

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