Question: Two objects with masses m1 and m2 approach each other with equal and opposite momentum so that the total momentum is zero. Show that, if

Two objects with masses m1 and m2 approach each other with equal and opposite momentum so that the total momentum is zero. Show that, if the collision is elastic, the final speed of each object must be the same as its initial speed. (The final velocity of each object is not the same as its initial velocity, however.)

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