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C) Universal Law of Gravity
Gravity  mutual force of attraction between any two objects in the universe
G = Gravitational constant = 6.67 x 10^{11} Nm^{2}/kg^{2}
m_{1}, m_{2} two masses
r  distance between
Giancoli p. 131) 28
F_{g} proportional to
F_{g} inversely proportional to the square of distance between the object's center of mass
Ex) If the gravitational force on satellite A is 160,000 N, what is the gravitational force on satellite B?
F = 40,000 N
(twice distance, 1/4 the force)
Ranking Task
Enrichment
Determining G, Cavendish
ŠTony Mangiacapre.,  All Rights
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