Problem 11. A block of mass m =10 kg 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 horizontal surface.It travels over this rough surface for 6 m followed by 3 m more on a frictionless horizontal surface.At this point, the block compresses a spring by 0.3 m before stopping. The spring constant is 2250 N/m. Find the coefficient of kinetic friction describing the interaction between the block and the rough surface.