如图所示,半径为R=0.45m的光滑的1/4圆弧轨道AB与粗糙平面BC相连,质量m=2kg的物块由静止开始从A点滑下经B点进入动摩擦因素μ=0.2的平面.求(1)物块经B点后2s内所滑行的距离(2)物体沿水平面
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![如图所示,半径为R=0.45m的光滑的1/4圆弧轨道AB与粗糙平面BC相连,质量m=2kg的物块由静止开始从A点滑下经B点进入动摩擦因素μ=0.2的平面.求(1)物块经B点后2s内所滑行的距离(2)物体沿水平面](/uploads/image/z/5578770-66-0.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%8D%8A%E5%BE%84%E4%B8%BAR%3D0.45m%E7%9A%84%E5%85%89%E6%BB%91%E7%9A%841%2F4%E5%9C%86%E5%BC%A7%E8%BD%A8%E9%81%93AB%E4%B8%8E%E7%B2%97%E7%B3%99%E5%B9%B3%E9%9D%A2BC%E7%9B%B8%E8%BF%9E%2C%E8%B4%A8%E9%87%8Fm%EF%BC%9D2kg%E7%9A%84%E7%89%A9%E5%9D%97%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E4%BB%8EA%E7%82%B9%E6%BB%91%E4%B8%8B%E7%BB%8FB%E7%82%B9%E8%BF%9B%E5%85%A5%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E7%B4%A0%CE%BC%3D0.2%E7%9A%84%E5%B9%B3%E9%9D%A2.%E6%B1%82%EF%BC%881%EF%BC%89%E7%89%A9%E5%9D%97%E7%BB%8FB%E7%82%B9%E5%90%8E2s%E5%86%85%E6%89%80%E6%BB%91%E8%A1%8C%E7%9A%84%E8%B7%9D%E7%A6%BB%EF%BC%882%EF%BC%89%E7%89%A9%E4%BD%93%E6%B2%BF%E6%B0%B4%E5%B9%B3%E9%9D%A2)
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