Part (a)
Maximum height of lunar module to shut off the engine if the velocity of the lander relative to the surface at that moment is 0 m/s.
Part (b)
Maximum height of lunar module to shut off the engine if the velocity of the lander relative to the surface at that moment is
Part (c)
Maximum height of lunar module to shut off the engine if the velocity of the lander relative to the surface at that moment is
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