1 . A 1.07 kg toy cannon is loaded with a 54g tennis ball and placed on the floor. If the cannon recoils with a speed of 9.8 m/s, what is the speed of the ball? - V= 0 54 = 0.054 kg P= MV - 1. 07 x98 =-10.48 10.48 10. 08 4 = 0. 054 V 0.054 2. A 70 kg male and a 48 kg female pair figure skating team are gliding across the ice at 5.4 m/s, preparing for a throw-jump maneuver. The male skater tosses the female skater forward with a speed of 5.6 m/s. Determine the speed of the male skater immediately after the throw. 70kg () 48 *g V = ? PF = 637.2 37.2 = 70v+ 48 x5. 6 70kg ) - 18 kq ) 5.4m/ 8 6372 = 70 V + 269 . 8 - 268. 8 - 268 - 2 5.4m/s RP 368.4 - 70V P.= MV = [7 0 + 48 ) 637.2 kg. mis 3 . A 71.9 kg boy and 48.2 kg girl, both wearing skates, face each other at rest on a skating rink. The boy pushes the girl, sending her eastward with a speed of 3.64 m/s. Neglecting friction, determine the subsequent velocity of the boy. 4. A 450g black crow is feasting on a bird feeder. The crow is suddenly startled when someone walks by to shoo the bird away. If the bird pushes off of the 670g feeder with a takeoff speed of 1.5 m/s, what is the speed of the feeder as it recoils backwards? An 1850 kg van at rest is struck from the rear by a compact car of mass 975 kg going 22 m/s to the north. 5 . The cars become entangled and move together. What is the velocity of the entangled mass?Law of Conservation of Momentum