A 20.0 kilogram toboggan with 69.9 kilogram driver is sliding down a frictionless chute directed 31.6 degree below the horizontal at 7.70 m/s when a 55.0 kilogram lady drops from a tree limb straight down behind the driver. If she drops through a vertical displacement of 2.00 meter, find what is the subsequent velocity of the toboggan immediately after impact?
m/s