如图所示某装卸工人推着质量为m的木箱在水平地面上匀速运动已知木箱与地面间的动�擦因数为μ该工人推力与水平面间夹角为α求工人推力的大小 Template




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tomski如图所示某装卸工人推着质量为m的木箱在水平地面上匀速运动已知木箱与地面间的动�擦因数为μ该工人推力与水平面间夹角为α求工人推力的大小 coloring