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A Planet Has Mass MP and Radius RP

Question 62

Multiple Choice

A planet has mass mP and radius RP. Suppose a rod of uniform diameter and length RP 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 planet has mass m<sub>P</sub> and radius R<sub>P</sub>. Suppose a rod of uniform diameter and length R<sub>P</sub> 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<sub>P</sub>/3 C) 2R<sub>P</sub>/5 D) R<sub>P</sub>/2 E) 3R<sub>P</sub>/4


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

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