Question: A 62.0-kg skier is moving at 6.50 m/s on a frictionless horizontal snow-covered plateau when she encounters a rough patch 3.50 mlong. The coefficient of kinetic friction between this patch and her skisis 0.300. After crossing the rough patch and returning to friction-free snow,she skis down an icy, frictionless hill 2.50 m high.
(a) How fast is the skier moving when she gets to the bottom ofthe hill?
(b) How much internal energy was generated in crossing the roughpatch?