如图所示一木块放在水平面上在水平方�施加外力f1=10nf2=4n木块处于静止状态.若撤去外力f1则木块受到的�擦力大小为44n Template




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tomski如图所示一木块放在水平面上在水平方�施加外力f1=10nf2=4n木块处于静止状态.若撤去外力f1则木块受到的�擦力大小为44n coloring