Universal Gravitation
Equation: Universal Gravitation
F9 = Gmlm2
Fs = gravitational force, N
G = universal gravitation constant, 6.67 x !0"11 N.mZ/kgz
m = mass of object, kg
r = distance between centers of masses, m
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• radius of earth = 6400 km ÿjÿ/00l 000
° mass of earth = 5.98 x 10z4 kg
° W=Fÿ
• gÿG
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2. A girt has ÿ mass of 60. k9 on the earth's surface. What would she weigh at a bright above
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the earth's surface of one earth
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The acceleration of gravity on the surface of Mars is 0.40g. How much will a person whose
weight on the Earth's surface is 980 N weigh on the surface of Mars? (392. N)
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Find the weight of an 80.0 kg person at the earth's surface and at an altitude of 2000. kin.
(452 N)
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5. At what altitude will a person's weight be half what it is at the earth's surface?
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(2651 kin)
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