3N和4N两个力的合力的最小值是( )
A. 0
B. 1N
C. 5N
D. 7N
人气:374 ℃ 时间:2019-10-19 23:05:15
解答
3N和4N两个力的合力的最小值Fmin=4-3N=1N.故B正确,A、C、D错误.
故选B.
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