# A ball with a mass of #7 kg # and velocity of #1 m/s# collides with a second ball with a mass of #6 kg# and velocity of #- 5 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?

The final velocity is

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To find the final velocities of the balls, you can use the conservation of momentum and the fact that 75% of the kinetic energy is lost during the collision. First, calculate the initial momentum of the system using the masses and velocities of the balls. Then, use the fact that momentum is conserved during the collision. Finally, use the conservation of kinetic energy to find the final velocities of the balls.

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