W = F * d
W = 75 J
d = 15 m
F = ????
75 = F * 15
75/15 = F
F = 5
Second One Down <<<<<====== Answer
Your answer would be both A and B, so c.
It would ultimately cost the government more considering it doesnt break down.
Attraction forces subtract one to each other....and there is a point where such forces are perfectly equal...such point is such that its distance from earth c.o.m. is √81 = 9.00 times greater than its distance from moon c.o.m.
Generic point gravity g can be evaluated this way
ge = Me*G/de^2
gm = Mm*G/(3.844*10*8-de)^2
g = ge-gm
ge/gm = 81*(1-d)^2/d^2
if ge/gm = 1, then :
de^2 = 81(1-de)^2
the answer is false: energy cannot be destroyed, but can be transferred.