[填空题]
What minimum horsepower must a mo m2c)m,xbp p pdv p5y*1)waby9tfm 1z,tor have to beoics.*yq 6h)mnwubi (ka () d0 able to drag a 310-kg box along a level floor at a speed of 1imu )*(con a ky ihq)wd6.(0bs.2m/s if the coefficient of friction is 0.45? hp
