物理 做功两个互相垂直的力F1和F2作用在同一物体上,物体发生一段位移后,力F1对物体做功为4J,力F2对物体做功为3J,则力F1与F2的合力对物体做功为( )A 7J B 5J 答案选A我选B
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![物理 做功两个互相垂直的力F1和F2作用在同一物体上,物体发生一段位移后,力F1对物体做功为4J,力F2对物体做功为3J,则力F1与F2的合力对物体做功为( )A 7J B 5J 答案选A我选B](/uploads/image/z/12975150-30-0.jpg?t=%E7%89%A9%E7%90%86+%E5%81%9A%E5%8A%9F%E4%B8%A4%E4%B8%AA%E4%BA%92%E7%9B%B8%E5%9E%82%E7%9B%B4%E7%9A%84%E5%8A%9BF1%E5%92%8CF2%E4%BD%9C%E7%94%A8%E5%9C%A8%E5%90%8C%E4%B8%80%E7%89%A9%E4%BD%93%E4%B8%8A%2C%E7%89%A9%E4%BD%93%E5%8F%91%E7%94%9F%E4%B8%80%E6%AE%B5%E4%BD%8D%E7%A7%BB%E5%90%8E%2C%E5%8A%9BF1%E5%AF%B9%E7%89%A9%E4%BD%93%E5%81%9A%E5%8A%9F%E4%B8%BA4J%2C%E5%8A%9BF2%E5%AF%B9%E7%89%A9%E4%BD%93%E5%81%9A%E5%8A%9F%E4%B8%BA3J%2C%E5%88%99%E5%8A%9BF1%E4%B8%8EF2%E7%9A%84%E5%90%88%E5%8A%9B%E5%AF%B9%E7%89%A9%E4%BD%93%E5%81%9A%E5%8A%9F%E4%B8%BA%EF%BC%88+++%EF%BC%89A+7J+++B+5J+%E7%AD%94%E6%A1%88%E9%80%89A%E6%88%91%E9%80%89B)
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