Question

The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?

Answer 1

2.25/4=x/6
4x=13.5
x=13.5/4lb

Answer 2

hmm i got
A=k/(d^2)
2.25=k/16
36=k
A=36/(d^2)
A=36/(6^2)
A=36/36=1