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85问答库 > 灯的重力与灯对线的拉力是一对平衡力吗。理由是？

灯的重力与灯对线的拉力是一对平衡力吗。理由是？

2025-03-16 04:16:37

推荐回答（3个）

回答1：

应该先明确平衡力概念
平衡力（二力平衡）首先应该是作用在同一物体上即两个力的受力物体是同一个
本题中灯受到的重力受力物体是灯，施力物体是地球；灯对线的拉力受力物体是线，施力物体是灯。显然这两个力没有作用在同一个物体上，它们不是平衡力。
重力的平衡力是线对灯的拉力

回答2：

不对是线对灯的拉力。因为二力平衡。灯受lipingheng

回答3：

是线对灯的拉力

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