Two Particles, Each of Mass M, Are a Distance D

question 1

Multiple Choice

Two particles, each of mass m, are a distance d apart.To bring a third particle, with mass 2m, from far away to a resting point midway between the two particles, an external agent must do work equal to:

• A)4Gm²/d
• B)-4Gm²/d
• C)8Gm²/d
• D)-8Gm²/d
• E)zero

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