Answer
a) the potential energy of the satellite-Earth system
U=−rGMM′
Where M is mass of earth and othercof satellite.
U=−2×1066.67××10−11×5.97×1024
= −20×107J
b) magnitude of the gravitational force exerted by the earth on the satellite
F=r2GMM′
=(2×106)26.67××10−11×5.97×1024
=100N
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