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OpenStudy (anonymous):

A block of mass 3.00 kg slides down a 30degree incline from an initial height of 4.00m. At the bottom it strikes a block of mass 7.00kg at rest on a horizontal surface. Assume the collision is elastic and friction can be ignored. Find the speed of each block after the collision. How far back up the incline will the smaller mass go?

OpenStudy (anonymous):

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