配套习题- 同一直线上力的合成问题 -【青果学院】

1/5单选题

难度：

1.关于同一直线上两个力的合力，下列说法正确的是（　　）

A	合力可能为零
B	合力可能与这两个力的方向都不同
C	合力一定大于其中任何一个力
D	合力一定小于其中任何一个力

正确答案：QQ==

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

2/5单选题

难度：

2.作用在同一直线上的两个力大小都是F，其合力为（　　）

A	一定大于F
B	一定小于F
C	一定等于2F
D	可以为零

正确答案：RA==

77yIMe+8ieW9k+S4pOS4quWKm+aWueWQkeebuOWQjOaXtu+8jOWQiOWKm0Y8c3ViPuWQiDwvc3ViPj1GK0Y9MkbvvIw8YnI+77yIMu+8ieW9k+S4pOS4quWKm+aWueWQkeebuOWPjeaXtu+8jOWQiOWKm0Y8c3ViPuWQiDwvc3ViPj1GLUY9MO+8jDxicj7nlLHvvIgx77yJ77yIMu+8ieWPr+efpe+8jEFCQ+mUmeivr++8jETmraPnoa7vvJs8YnI+5pWF6YCJRC4g

3/5单选题

难度：

3.同一直线上的两个力作用在同一物体上，已知其中一个力是300N，合力是800N. 则另一个力是（　　）

A	一定等于500N
B	一定小于500N
C	可能等于1100N
D	一定大于1100N

正确答案：Qw==

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

4/5单选题

难度：

4.同一直线上的两个力，当它们同向时，合力为20N，当它们反向时，合力为8N，则二力大小为（　　）

A	20N，8N
B	12N，8N
C	14N，6N
D	16N，4N

正确答案：Qw==

5Zug5Li65b2T5LqM5Yqb5ZCM5pa55ZCR5pe277yM5LqM5Yqb55qE5ZCI5Yqb5aSn5bCP562J5LqOMjBO77yM55Sx5LqOQemAiemhueS4reS6jOWKm+S5i+WSjOS4jeetieS6jjIwTu+8jOaVhUHpgInpobnplJnor6/vvJvlj4jlm6DkuLrlvZPkuozlipvlj43lkJHml7bvvIzkuozlipvkuYvlt67nrYnkuo44Tu+8jOiAjEJE6YCJ6aG55Lit5LqM5Yqb5LmL5beu5LiN562J5LqOOE7vvIzmlYVCROmAiemhuemUmeivr++8jEPpgInpobnkuK3kuozlipvkuYvlt67nrYnkuo44Tu+8jOaVhUPpgInpobnnrKblkIjpopjmhI8uIDxicj7mlYXpgIkgQy4g

5/5单选题

难度：

5.同一直线上的两个力F₁=10N，F₂=8N，则它们的合力不可能是（　　）

A	18N
B	2N
C	18N或2N
D	20N

正确答案：RA==

5ZCM5LiA55u057q/5LiK55qE5Lik5Liq5YqbRjxzdWI+MTwvc3ViPj0xME7vvIxGPHN1Yj4yPC9zdWI+PThO77yM6Iul5Lik5Liq5Yqb55qE5pa55ZCR55u45ZCM77yM5YiZ5ZCI5Yqb5Li6Rj1GPHN1Yj4xPC9zdWI+K0Y8c3ViPjI8L3N1Yj49MTBOKzhOPTE4Tu+8mzxicj7oi6XkuKTkuKrlipvnmoTmlrnlkJHnm7jlj43vvIzliJlGPUY8c3ViPjE8L3N1Yj4tRjxzdWI+Mjwvc3ViPj0xME4tOE49Mk4uIDxicj7miYDku6XlkIjlipvlj6/og73mmK8yTuaIljE4Ti4gPGJyPuaVhemAiUQuIA==