A Planet Has Mass M_P and Radius R_P

question 39

Multiple Choice

A planet has mass m_P and radius R_P.Suppose a rod of uniform diameter and length R_P extends vertically from the surface of the planet.Where is the center of gravity of the rod as measured from the surface of the planet? The mass of the rod is much less than the mass of the planet.

• A)0
• B)R_P/3
• C)2R_P/5
• D)R_P/2
• E)3R_P/4

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