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Tomliu

A 194 block is launched by compressing a spring of constant 200 a distance of 15 . The spring is mounted horizontally, and the surface directly under it is frictionless. But beyond the equilibrium position of the spring end, the surface has coefficient of friction . This frictional surface extends 85 , followed by a frictionless curved rise, as shown in the figure.

After launch, where does the block finally come to rest? Measure from the left end of the frictional zone.

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弹簧力储存的势能减掉摩擦消耗的能量剩下的就是沿curve上升的高度所具有的势能