An 80.0 - kg skydiver jumps out of a balloon at an altitude of1.00 x 103 m and opens the parachute at an altitude of 200.0 m.(a) Assuming that the total retarding force on the diver isconstant at 50.0 N with the parachute closed and constant at3.60 x 103 N with the parachute open, what is the speed ofthe diver when he lands on the ground? (b) Do you think theskydiver will get hurt? Explain. (c) At what height should theparachute be opened so that the final speed of the skydiverwhen he hits the ground is 5.00 m/s? (d) How realistic is theassumption that the total retarding force is constant? Explain.

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