Plz help physics homework

Sthat Hasson Perled A 1.2- kilogram block and a 1.8-kilogram block are | 4. Ball A of mass 5.0 kilograms moving at 20 meters per intrially at rest on a frictionless, horizontal purface. cond collides with ball B of unknown man moving When a compressed spring between the blocks is re- at 10 meters per second in the same direction, After loaned, the 18 kilogram block moves to the right at the collision. hall A moves at 10 meters per second 2.0 meters per wocond, ai shown. and ball B at 15 meters per second, both still in the 2.0 m's same direction. What is the mass of ball BP 1. 6.0 kg 2.0 kg 1.2 kg 1.8 kg 10 kk 12 kg Frictionless horizontal surface In the diagram below, scaled vectors represent the What is the speed of the 1:2-kilogram block after momentum of each of two masses, A and B. slid- the spring is released? 1. 1.4 m/ A MA Ing toward each other on a frictionless, horizontal surface: 20 m/a 3.0 m/ Mass A Frictionless surface Mass B 3.6 m/s Which scaled vector best represents the momentum Base your answers to questions 2 and 3 on the informa- of the system after the masses collider tion below (1) (3) An 8.00-kilogram ball is fired horizontally from a 1.00 10'-kilogram cannon initially at rest. After hav- (4) ing been fired, the momentum of the ball is 2.40 x 10' kilogram-meters per second east. [ Neglect friction.] 6. At the circus, a 100-kilogram clown is fired 15 meters per second from a Calculate the magnitude of the cannon's velocity 500-kilogram cannon. What is the after the ball is fired. [Show all work, including the recoil speed of the cannon? equation and substitution with units.] 1. 75 m/s 15 m/s 15m/s 3. 3.0 m/s 4 5.0 m/s 7. A woman with horizontal velocity , jumps off a dock into a stationary boat. After landing in the boat, the woman and the boat move with velocity u. Com- pared to velocity v, velocity v, has 1. the same magnitude and the same direction 2. the same magnitude and the opposite direction 3. smaller magnitude and the same direction 4. larger magnitude and the same direction itify the direction of the cannon's velocity after all is fired. s: Momentum-Conservation MOM.B1 Page 75