如图所示物体在粗糙的水平面上受到一个与水平方�成α角的拉力f的作用匀速�右运动若拉力f的方�与水平方�所成的α角的减小物体仍匀速运动 Template




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tomski如图所示物体在粗糙的水平面上受到一个与水平方�成α角的拉力f的作用匀速�右运动若拉力f的方�与水平方�所成的α角的减小物体仍匀速运动 coloring