(1) 弓被拉开时具有( )能,在恢复原状的过程中( )对箭做功,而使箭具有( )而射出(2)用一个动滑轮来提升重物,如果滑轮自重20牛,手向上拉绳的拉力是32牛,摩擦可不考虑.则物体重为( )牛,这个滑轮
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/01 06:02:50
![(1) 弓被拉开时具有( )能,在恢复原状的过程中( )对箭做功,而使箭具有( )而射出(2)用一个动滑轮来提升重物,如果滑轮自重20牛,手向上拉绳的拉力是32牛,摩擦可不考虑.则物体重为( )牛,这个滑轮](/uploads/image/z/6977841-33-1.jpg?t=%281%29+%E5%BC%93%E8%A2%AB%E6%8B%89%E5%BC%80%E6%97%B6%E5%85%B7%E6%9C%89%28+%29%E8%83%BD%2C%E5%9C%A8%E6%81%A2%E5%A4%8D%E5%8E%9F%E7%8A%B6%E7%9A%84%E8%BF%87%E7%A8%8B%E4%B8%AD%28+%29%E5%AF%B9%E7%AE%AD%E5%81%9A%E5%8A%9F%2C%E8%80%8C%E4%BD%BF%E7%AE%AD%E5%85%B7%E6%9C%89%28+%29%E8%80%8C%E5%B0%84%E5%87%BA%282%29%E7%94%A8%E4%B8%80%E4%B8%AA%E5%8A%A8%E6%BB%91%E8%BD%AE%E6%9D%A5%E6%8F%90%E5%8D%87%E9%87%8D%E7%89%A9%2C%E5%A6%82%E6%9E%9C%E6%BB%91%E8%BD%AE%E8%87%AA%E9%87%8D20%E7%89%9B%2C%E6%89%8B%E5%90%91%E4%B8%8A%E6%8B%89%E7%BB%B3%E7%9A%84%E6%8B%89%E5%8A%9B%E6%98%AF32%E7%89%9B%2C%E6%91%A9%E6%93%A6%E5%8F%AF%E4%B8%8D%E8%80%83%E8%99%91.%E5%88%99%E7%89%A9%E4%BD%93%E9%87%8D%E4%B8%BA%28+%29%E7%89%9B%2C%E8%BF%99%E4%B8%AA%E6%BB%91%E8%BD%AE)
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