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9. A 2 kg ball, moving to the right at a velocity of 2 m/s on a frictionless table, has an elastic head-on collision with

9. A 2 kg ball, moving to the right at a velocity of 2 m/s on a frictionless table, has an elastic head-on collision with a stationary 5 kg ball. What is the total kinetic energy before the collision? What is the total kinetic energy after the collision?

(Total Kinetic Energy Before the collision is 4J

Total Kinetic Energy After the collision is 6.1912J) MY ANSWER Did I make a mistake?

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