如图所示木块b放在粗糙的水平面上木块a放在b的上面a的右端通过一不可伸长的轻绳固定在竖直墙上用水平恒力f�左拉动b使其以速度v做匀速 Template




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tomski如图所示木块b放在粗糙的水平面上木块a放在b的上面a的右端通过一不可伸长的轻绳固定在竖直墙上用水平恒力f�左拉动b使其以速度v做匀速 coloring