On a touchdown attempt, a 95.0 kg running back runs toward the end zone at 3.75 m/s. A 111. kg linebacker moving at 4.10 m/s meets the runner in a head on collision. If the two players stick together,

a) What is their velocity immediately after the collision?

b) What are the initial and final kinetic energies of the system?

c) What caused the difference?

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