Gravitational Force: Two small objects, with masses m and M, are originally a distance r apart, and the gravitational force on each one has magnitude F. The second object has its mass changed to 2M, and the distance is changed to r/4. What is the magnitude of the new gravitational force?
A. F/32
B. F/16
C. 16F
D. 32F
E. 2F
Answer: D
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