Question

Ann, a 66.2 kg person throws a 0.0461 kg snowball forward with a ground speed of 39.2 m/s. Billy, with a mass of 54.8 kg, catches the snowball. Both people are on skates (Disregard friction between the skates and the ice. ). Ann is initially moving forward with a speed of 2.02 m/s, and Billy is initially at rest. After the snowball is exchanged (a) What is the momentum of Ann and the snowball before she makes the throw?