A skydiver is jumping out of an airplane. During a part of the jump, the parachute is unopened, and the magnitude of air resistance acting on the skydiver is 251 N [up]. The acceleration of the skydiver at this time is 5.96 m/s? (down). Calculate the mass of the skydiver.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?