试题与答案

一物体受到大小分别为3N和4N两个力的作用．当这两个力方向相同时，合力大小为__

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题型：填空题

题目：

一物体受到大小分别为3N和4N两个力的作用．当这两个力方向相同时，合力大小为______N；当这两个力相互垂直时，合力大小为______N．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

考点：力的合成
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