. If we wanted to bring the 694 kg (approx. 3/4 ton) probe back to Earth...
. If we wanted to bring the 694 kg (approx. 3/4 ton) probe back to Earth upon completing its mission, how much energy would be needed completely escape Mars’ gravity?
Homework Answers
here,
mass of Mars, M = 6.39 * 10^23 kg
radius of Mars , r = 3.3895 * 10^6 m
mass , m = 694 kg
the orbital speed , v = sqrt(2*GM/r)
the kinetic energy needed , KE = 0.5 * m * v^2
KE = 0.5 * m * ( 2 * G * M /r)
KE = 0.5 * 694 * ( 2 * 6.67 * 10^-11 * 6.39 * 10^24 /(3.3895 * 10^6))
KE = 8.73 * 10^10 J
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