A m = 10 kg block is released from a height of h = 3 m. It travels down a frictionless circular shaped ramp to the bottom where it encounters a rough surface. It travels over this rough surface for 6 m followed by 3 m more on a frictionless surface. At this point the block compresses a spring by 0.3 m before stopping. The spring constant of the spring is 2250 N/m. Find the coefficient of kinetic friction for the rough surface.