MCAT Question A Day - 4/15/14 - Answer!
Two point charges attract each other with a force of 3.6 x 10-6 N when they are 3m apart. What is the force if the distance is increased to 6m?
A. It is tripled.
B. It is reduced to one-ninth.
C. It is quadrupled.
D. It is quartered.
The correct answer is (D). The force is inversely proportional to the square of the distance between the point charges. Since the distance is doubled, the force must be quartered.
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The correct answer is (D). The force is inversely proportional to the square of the distance between the point charges. Since the distance is doubled, the force must be quartered.
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