The two skydivers were in free fall till they reached terminal velocity of 115 miles per hour (due to the air resistance) at 1.542 kilometers above the surface of the Earth. Just before they reached an altitude of 1km, they comprehend Suzie brought her backpack with her Physics book rather than her parachute. Shane maneuvers towards Suzie at 0.5m/s to let her to share his parachute.
Suppose the weight of Shane and Suzie is given for sea level.
Suppose that gravitational attraction is not height dependent.
Determine their average speed (in the vertical direction only) for the net trip from where the two reached terminal velocity.