Consider two celestial objects with masses m1 and m 2 with a separation distance between their centers r. If the separation distance r were to be reduced to a quarter (1/4), what would happen to the magnitude of the force of attraction?
a. It increases by a factor of 4.
b. It increases by a factor of 16.
c. It remains unchanged.
d. It increases by a factor of 8.
e. It decreases by a factor of 4 .