A Concorde with a full fuel load stalls at approximately 310 kilometers per hour at standard temperature and pressure (sea level, 20 Celsius). A human body reaches terminal velocity in air at the velocity where the force acting on it due to gravitational attraction is equal to the aerodynamic drag it experiences: approximately 200 kilometers per hour if spread-eagled and at sea-level pressure, but considerably higher if streamlined, and/or at higher altitude (hence lower pressure). How much force does Jim have to exert to reach a velocity of 310 kilometers per hour at 2400 meters altitude, if
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