用绳子将实心物体从水面下12m 深处沿竖直方向匀速提升到离水面1.5m深处的过程所用时间为42s,拉力F做功的功.(水的密度ρ水=1.0×103kg/m3,g=10N/kg )求:(1)物体从水面下12m深处匀速上升到离
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![用绳子将实心物体从水面下12m 深处沿竖直方向匀速提升到离水面1.5m深处的过程所用时间为42s,拉力F做功的功.(水的密度ρ水=1.0×103kg/m3,g=10N/kg )求:(1)物体从水面下12m深处匀速上升到离](/uploads/image/z/14716309-13-9.jpg?t=%E7%94%A8%E7%BB%B3%E5%AD%90%E5%B0%86%E5%AE%9E%E5%BF%83%E7%89%A9%E4%BD%93%E4%BB%8E%E6%B0%B4%E9%9D%A2%E4%B8%8B12m+%E6%B7%B1%E5%A4%84%E6%B2%BF%E7%AB%96%E7%9B%B4%E6%96%B9%E5%90%91%E5%8C%80%E9%80%9F%E6%8F%90%E5%8D%87%E5%88%B0%E7%A6%BB%E6%B0%B4%E9%9D%A21.5m%E6%B7%B1%E5%A4%84%E7%9A%84%E8%BF%87%E7%A8%8B%E6%89%80%E7%94%A8%E6%97%B6%E9%97%B4%E4%B8%BA42s%2C%E6%8B%89%E5%8A%9BF%E5%81%9A%E5%8A%9F%E7%9A%84%E5%8A%9F%EF%BC%8E%EF%BC%88%E6%B0%B4%E7%9A%84%E5%AF%86%E5%BA%A6%CF%81%E6%B0%B4%3D1.0%C3%97103kg%2Fm3%2Cg%3D10N%2Fkg+%EF%BC%89%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89%E7%89%A9%E4%BD%93%E4%BB%8E%E6%B0%B4%E9%9D%A2%E4%B8%8B12m%E6%B7%B1%E5%A4%84%E5%8C%80%E9%80%9F%E4%B8%8A%E5%8D%87%E5%88%B0%E7%A6%BB)
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