As shown in the figure below, a 2.25 kg block is released from rest on a ramp of height h = 0.650 m.  When the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.0 cm that has a coefficient of kinetic friction μ = 0.800. Find the block’s kinetic energy after crossing the rough patch.

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