manaspercy
29.01.2020 •
Physics
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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Ответ:
0.26666666666 miles per hour