You are standing on a sheet of ice which covers the football stadium parking lot in Buffalo; there is negligible friction among your feet and the ice. A friend throws you a 0.400 kg ball which is traveling horizontally at 10.0 m/s. Your mass is around 70.0 kg.
If you catch the ball, then with what speed do you and the ball move afterwards?
When the ball strikes you and bounces off your chest, so that afterwards it is moving horizontally at 8.00 in the opposite direction, find out your speed after the collision?