A model-train car of mass 275 gtraveling with a speed of, Physics

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A model-train car of mass 275 gtraveling with a speed of

A model-train car of mass 275 gtraveling with a speed of 0.50 m/s links up with another car ofmass 410 g that is initially at rest.

a) What is the speed of the cars immediately after they have linked together?
b) Find the initial kinetic energy.
c) Find the final kinetic energy.

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