Problem 7-35 Work-energy theorem - Part 2 - C

A girl pulls a box of mass $20.8\; kg$ across the floor. She is exerting a force on the box of $95.6\; N$, inclined at $35.0^\circ$ above the horizontal. The kinetic friction force on the box has a magnitude of $75.5\; N$. Use the work-energy theorem to determine the speed of the box after being dragged $0.750\; m$, assuming it starts from rest. [Ans. $0.45\; m/s$]

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