On a highly polished essentially frictionless lunch counter


On a highly polished, essentially frictionless lunch counter, a 0.520 kg submarine sandwich moving 3.15 m/s to the left collides with a 0.210 kg grilled cheese sandwich moving 1.10 m/s to the right.

If the two sandwiches stick together, what is their final velocity?

How much mechanical energy dissipates in the collision?

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Physics: On a highly polished essentially frictionless lunch counter
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