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Answer to Question #20378 in Mechanics | Relativity for Nezar beshr

Question #20378
A student attaches a rope to a 20.0 kg box of books. He pulls with a force of 90.0 N at an
angle of 30.0° with the horizontal and walks to the left. The coefficient of kinetic friction
between the box and the sidewalk is 0.500. Find the acceleration of the box.
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