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A 2000-kg car travelling at 50 m/s collides with an object of (your student number)-kg travelling...

A 2000-kg car travelling at 50 m/s collides with an object of (your student number)-kg travelling at 12 m/s inan opposite direction. (a) Find change in kinetic energy if both stick together and if collision is absolutely elastic. (b)Show final velocities in both cases for both objects. (c) What percentage of the original kinetic energy is this?

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