A Planet of Mass M Has a Moon of Mass

question 56

Multiple Choice

A planet of mass M has a moon of mass m in a circular orbit of radius R. An object is placed between the planet and the moon on the line joining the center of the planet to the center of the moon so that the net gravitational force on the object is zero. How far is the object placed from the center of the planet?

• A) R
• B) R
• C) R
• D) R
• E) R

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Definitions:

Bipolar Disorder

An emotional disorder defined by significant swings in mood, from high periods of mania or hypomania to low phases of depression.

Delusional Disorder

A psychiatric condition marked by the presence of one or more non-bizarre delusions without other psychotic symptoms.

Somatoform Disorder

A mental disorder characterized by physical symptoms that cannot be fully explained by any underlying medical condition.

Conversion Disorder

A mental condition where psychological stress is expressed through physical symptoms that have no organic cause.