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8. Two blocks of masses 8 kg and 4.3 kg are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord holding them together is burned, after which the block of mass 4.3 kg moves to the right with a speed of 19 m/s. What is the velocity of the other mass in m/s?

8. Two blocks of masses 8 kg and 4.3 kg are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord holding them together is burned, after which the block of mass 4.3 kg moves to the right with a speed of 19 m/s. What is the velocity of the other mass in m/s?

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8. Two blocks of masses 8 kg and 4.3 kg are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord holding them together is burned, after which the block of mass 4.3 kg moves to the right with a speed of 19 m/s. What is the velocity of the other mass in m/s? 9. Am = 500 kg sack of coal falls vertically onto a M = 2000 kg railroad flatcar which was initially moving horizontally at 3 m/s. No external forces, including friction, acton the flatcar. After the sack rests on the flatcar, the speedof the flatcar is: a) 1.8 m/s b) 2.4 m/s c) 3.6 m/s d) 0.6 m/s e) 1.2 m/s 10. Each croquet ball in a set has a mass of 0.53 kg. The green ball, traveling at 11.9 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the green ball stops moving after it strikes the blue ball. 11. Each croquet ball in a set has a mass of 0.53kg. The green ball, traveling at 11.9 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the green ball continues moving after the collision at 2.5 m/s in the same direction. obbeqju
Transcribed Image Text:8. Two blocks of masses 8 kg and 4.3 kg are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord holding them together is burned, after which the block of mass 4.3 kg moves to the right with a speed of 19 m/s. What is the velocity of the other mass in m/s? 9. Am = 500 kg sack of coal falls vertically onto a M = 2000 kg railroad flatcar which was initially moving horizontally at 3 m/s. No external forces, including friction, acton the flatcar. After the sack rests on the flatcar, the speedof the flatcar is: a) 1.8 m/s b) 2.4 m/s c) 3.6 m/s d) 0.6 m/s e) 1.2 m/s 10. Each croquet ball in a set has a mass of 0.53 kg. The green ball, traveling at 11.9 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the green ball stops moving after it strikes the blue ball. 11. Each croquet ball in a set has a mass of 0.53kg. The green ball, traveling at 11.9 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a frictionless surface and all collisions are head-on, find the final speed of the blue ball if the green ball continues moving after the collision at 2.5 m/s in the same direction. obbeqju
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