A 0.5 kg block of cheese on a frictionless tabletop collides with and sticks to a 0.2 kg apple. Before the collision, the cheese was moving at 1.9 m/s, and the apple was at rest. The cheese and the apple then slide together off the edge of the table and fall to the floor 0.6 m below. What is the speed of the cheese and the apple just before they hit the floor?