The first moving object is moving west at 10 m/s.  The second moving object is moving west at 15 m/s.  What is the momentum of the system before and after the collision?  What is the velocity of the moving objects after the collision?  My teacher said the collision is sticking, but how do we know that? Collisions are elastic. The first moving object and the second moving object both weigh 1500 kg. Show unknowns and knowns Use formula mv (before) = mv (after) and then solve for v (after

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