初三 物理 杠杆 请详细解答,谢谢! (4 16:52:22) 1.体重400N的小明亲自动手将100N的物体搬到3m高的楼上.他对物体做的功是________J,做功效率是_______. 2.下列物体属于省力杠杆的是(
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![初三 物理 杠杆 请详细解答,谢谢! (4 16:52:22) 1.体重400N的小明亲自动手将100N的物体搬到3m高的楼上.他对物体做的功是________J,做功效率是_______. 2.下列物体属于省力杠杆的是(](/uploads/image/z/3827198-38-8.jpg?t=%E5%88%9D%E4%B8%89+%E7%89%A9%E7%90%86+%E6%9D%A0%E6%9D%86+%E8%AF%B7%E8%AF%A6%E7%BB%86%E8%A7%A3%E7%AD%94%2C%E8%B0%A2%E8%B0%A2%21++++%284+16%3A52%3A22%29%26%23160%3B1.%E4%BD%93%E9%87%8D400N%E7%9A%84%E5%B0%8F%E6%98%8E%E4%BA%B2%E8%87%AA%E5%8A%A8%E6%89%8B%E5%B0%86100N%E7%9A%84%E7%89%A9%E4%BD%93%E6%90%AC%E5%88%B03m%E9%AB%98%E7%9A%84%E6%A5%BC%E4%B8%8A.%E4%BB%96%E5%AF%B9%E7%89%A9%E4%BD%93%E5%81%9A%E7%9A%84%E5%8A%9F%E6%98%AF________J%2C%E5%81%9A%E5%8A%9F%E6%95%88%E7%8E%87%E6%98%AF_______.%26%23160%3B2.%E4%B8%8B%E5%88%97%E7%89%A9%E4%BD%93%E5%B1%9E%E4%BA%8E%E7%9C%81%E5%8A%9B%E6%9D%A0%E6%9D%86%E7%9A%84%E6%98%AF%EF%BC%88%26%23160%3B%26%2316)
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