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A uniform sphere is rolling down an incline from rest and collides with a concrete block...

A uniform sphere is rolling down an incline from rest and collides with a concrete block on wheels at the bottom. The mass of the concrete block is 4 times that of the sphere. Find the final speed and directions of the sphere and the concrete block after they collide, if the collision were (a) elastic and (b) perfectly inelastic. Show all answers in terms of g and h. (c) What percent of kinetic energy does the sphere lose during the collision in part a)?

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