One block of mass m_1=2.0 kg is sliding down along a frictionless ramp from a height of h=2.5 m. It then collides with another block of mass m_2=1 kg and after the collision the stick together. Then, both of the blocks slide together into a region where the coefficient of kinetic friction is 0.500 and comes to a stop after distance d m within that region. a) Find the velocity of the block of mass m1 at the bottom of the ramp. b) Find the velocity of the two-block at which they slide into the region with kinetic friction coefficient 0.500. c) Find the value of distance d at which they stop.

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