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

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

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

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

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