The mass of Sputnik I was 83.5 kg, and its distances from the center of the Earth at apogee and perigee were 7330 km an...
Find the difference in gravitational potential energy for Sputnik I as it moved from apogee to perigee.
Homework Answers
G = 6.67 x 10-11 N-m²/kg²
ME = 5.97 x 1024 kg
U = -G ME m / r
ΔU = Up - Ua = (-G ME m /
rp) - (-G ME m / ra) = G
ME m (1 / ra - 1 / rp)
= (6.67*10-11)*(5.97*1024)*83.5((1/7330*103)-(1/6610*103))
= - 4.94 x 108 J
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