A64 kg sky diver jumped out of an airplane at an altitude of 0.90 km. she opened her parachute after a while and eventually landed on the ground with a speed of 5.8 m/s. how much energy was dissipated by air resistance during the jump?

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.