Catching a wave, a 77-kg surfer starts with a speed of 1.1 m/s, drops through a height of 1.60 m, and ends with a speed of 8.5 m/s.

How much nonconservative work was done on the surfer?

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  1. W+(.5*77*1^2)+(77*9.8*1.65)=(.577*8.3^2)+(77*9.8*0)

    based on nonconservative equation neglecting kinetic energy

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