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A 1.2 kg block is held at rest against a spring with a forceconstant k=730 N/m. Intially the spring is compressed a distanced. When the block is released, it slides across a surfacethat is frictionless except for a rough patch of width 5.0 cm that has a coefficent of kinetic friction μk=0.44. Find such that the blocks speed after crossing the roughpatch is 2.3 m/s.

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