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OpenStudy (happykiddo):
In the figure, a 826-kg crate is on a rough surface inclined at 30°. A constant external force P = 7432 N is applied horizontally to the crate. While this force pushes the crate a distance of 3.0 m up the incline, its velocity changes from 0.8 m/s to 2.7 m/s. What is the magnitude of the work done by friction in this process?
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