Two ice skaters, Daniel (mass 69.2 kg) and Rebecca (mass 50.1kg) are practicing. Daniel stops to tie his shoelace and, while atrest, is struck by Rebecca, who is moving at12.7 m/s before shecollides with him. After the collision, Rebecca has a velocity ofmagnitude 6.8 m/s at an angle of 50.1° from her initial direction.Both skaters move on the frictionless, horizontal surface of therink.
(a) What are the magnitude and direction of Daniel's velocityafter the collision?
m/s
(b) What is the change in total kinetic energy of the two skatersas a result of the collision?
