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15. An object at rest is suddenly broken apart into two fragments by an explosion. One fragment acquires twice the kinetic energy of the other.

15. An object at rest is suddenly broken apart into two fragments by an explosion. One fragment acquires twice the kinetic energy of the other. What is the ratio of their masses? 19. A mass my = 2.0 kg, moving with a velocity VA:(4.Oi+5.0 j 2.01A() m/s, collides with mass mg = 3.0 kg, which is initially at rest. Immediately after the collision, mass m, is observed traveling at velocity Vv',=(2.0 i+3.OlA

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