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Mathematics 7 Online
OpenStudy (anonymous):

A constant horizontal pull of 8.90N drags a box along a horizontal floor through a distance of 19.0m. Work of pull on box is 169 J. the same pull is exerted at an angle above the horizontal. If this pull now does 73.0J {\rm J} of work on the box while pulling it through the same distance, what angle does the force make with the horizontal?

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