Starting from rest a 5 kilogram crate slides 0.8 meter down a frictionless ramp (making an angle of 25 degree to the floor). When it reaches the bottom of the ramp, the block slides 3 meters across the floor before slowing to a stop.
Use energy principles to calculate the speed of the crate at the bottom of the ramp, and the coefficient of kinetic friction between the crate and the floor.