Waxed

Two sticky balls of wax (perfectly inelastic) are placed on a frictionless surface.

One has a mass of 20 g 20 \text{ g} and is sent due East at a speed of 2 cm/sec2 \text{ cm/sec}.

One has a mass of 10 g10 \text{ g} and is sent due West at a speed of 1 cm/sec1\text{ cm/sec}.

When they collide head-on and stick together, what direction and speed will the final 30 g 30\text{ g} ball of wax have?

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