Venus has a aphelion distance of 108.94*106 km and an orbital velocity of 34.79 km/s. What is Venus’s total orbital energy?
Total energy E = Kinetic energy + Potential energy
Kinetic energy
where m is the mass of Venus and v is its orbital velocity
mass m = 4.867 * 10^24 kg and orbital velocity is given as v = 34.79 km/s = 34790 m/s
therefore kinetic energy is
Potential energy
where G is the gravitational constant G = 6.674 * 10-11 m3 kg-1 s-2
M is the mass of the sun M = 1.989 * 1030 kg
r is the given aphelion distance r = 108.94 * 106 km = 1.0894 * 1011 m
therefore potential energy is
Therefore, total energy is
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