The Roche Limit Tells Us About the Point on a Rotating

question 64

Multiple Choice

The Roche Limit tells us about the point on a rotating planet where the gravitational force at the equator is just equal to the necessary centripetal force needed for rotation.Assuming the planet to be a uniform sphere of density 5520 kg/m³,find the shortest period of rotation possible before exceeding the Roche Limit.(G = 6.67 $\times$ 10^-11 N·m²/kg²)

• A)none of the following
• B)50 mins
• C)150 mins
• D)48 mins
• E)85 mins

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