As shown below, a lump of clay travels horizontally to the right at 2 m/s toward a block at rest on a frictionless surface. Upon collision, the clay and the block stick together and move to the right.

What is the velocity of the objects after the collision?

The best and most correct answer among the choices provided by your question is the first choice or letter A.

Quantum mechanics is different from classical mechanics because: quantum mechanics describes changes on the subatomic scale better than classical mechanics does.

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