A(n) 77.5 kg person throws a(n) 0.034 kg snowball forward with a ground speed of 39.9 m/s. a second person, of mass 66.6 kg, catches the snowball. both people are on skates. the first person is initially moving forward with a speed of 3.16 m/s, and the second person is initially at rest. what is the velocity of the first person immediately after the snowball is thrown? disregard friction between the skates and the ice

Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r