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A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37 degrees with the horizontal. If the opposing force of friction is 70 N, how much work does he do as he moves the carton in 4m in 15s? What power in watts has he expended ?

  • Physics -

    the final velocity of the carton is not given, so assume zero.





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