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11-03-2019
Physics

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8. A boy pulls a 20.0-kg box with a 140-N force at 30° above a horizontal surface. If the coefficient of kinetic friction between the box and the horizontal surface is 0.25 and the box is pulled a distance of 28.0 m, what is the net work done on the box?

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wh91079 wh91079

14-03-2019

0.280 m is the correct answer

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