People jump from much greater heights than this, explain how this is possible

a) if a person flexes her legs on landing, the energy is transformed not only into elastic energy in the bones, but also into elastic energy in other tissues and into thermal energy.
b) for a jump from greater height the air resistance significantly reduces the speed of the bogy just before the landing.
c) significant part of kinetic energy of the body just before the landing is absorbed by shoes during the landing

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.