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A 50.0 g marble moving at 2.30 m/s strikes a 21.0 g marble at rest. Note...

A 50.0 g marble moving at 2.30 m/s strikes a 21.0 g marble at rest. Note that the collision is elastic and that it is a "head-on" collision so all motion is along a line.

a. What is the speed of 50.0 g marble immediately after the collision?

b. What is the speed of 21.0 g marble immediately after the collision?

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