Two Comets Have Identical Masses

question 21

Multiple Choice

Two comets have identical masses. However, one comet is four times farther from the Sun than the other. According to Newton's Universal Law of Gravitation, the force of gravity exerted by the Sun on the more distant comet is

• A) one-quarter the size of the force exerted on the closer comet
• B) one-sixteenth the size of the force exerted on the closer comet
• C) the same size as the force exerted on the closer comet
• D) four times as large as the force exerted on the closer comet

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