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A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 kilograms. What is the kinetic energy of the system after the collision if the collision is elastic?

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if energy is conserved, KE after=KE before

KE after=1/2 m v^2=.001 *1.5^2 Joules

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