A 19.8 kg block is dragged over a rough, horizontal surface by a constant force of 183 N acting at an angle of 25◦ above the horizontal. The block is displaced 45.9 m, and the coefficient of kinetic friction is 0.235. The acceleration of gravity is 9.8 m/s^2. Find the work done by the force of friction. Answer in units of J. If the block was originally at rest, determineits final speed. Answer in units of m/s.

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