Question: If A (50 mathrm{~g}) marble moving at (2.0 mathrm{~m} / mathrm{s}) strikes a (20 mathrm{~g}) marble at rest. What is the speed of each marble

If A $50 \mathrm{~g}$ marble moving at $2.0 \mathrm{~m} / \mathrm{s}$ strikes a $20 \mathrm{~g}$ marble at rest. What is the speed of each marble immediately after the collision? Assume the collision is perfectly elastic and the marbles collide head-on.

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