中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
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 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWQjOS4gOebtOe6v+S4iizkuKTkuKrlipvlkIzmlrnlkJHlkIjlipvkuIDlrprlpKfkuo7ku7vkvZXkuIDkuKrlips=
- 提示2：IOWQjOS4gOebtOe6v+S4iizkuKTkuKrlipvlj43lkJHlkIjlipvlsI/kuo7mnIDlpKfkuIDkuKrlipss5pyA5bCP562J5LqOMA==
- 答案：QQ==
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本课配套习题挑战模式2/5
单选题
难度系数：
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 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWQjOaWueWQkeWQiOWKm+aYrzJG
- 提示2：IOWPjeaWueWQkeWQiOWKm+aYrzA=
- 答案：RA==
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本课配套习题挑战模式3/5
单选题
难度系数：
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 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWPpuS4gOS4quWKm+WPr+iDveWSjDMwME7lkIzlkJE=
- 提示2：IOS5n+WPr+iDveWSjDMwME7lj43lkJE=
- 提示3：IOS4gOWumuimgeiAg+iZkeWIsOS4pOenjeaDheWGtQ==
- 答案：Qw==
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本课配套习题挑战模式4/5
单选题
难度系数：
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 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOmAiemhueS4re+8jOS4pOS4quaVsOS5i+WSjOetieS6jjIw77yM5Lik5Liq5pWw5LmL5beu562J5LqOOOWwsea7oei2s+adoeS7tg==
- 答案：Qw==
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本课配套习题挑战模式5/5
单选题
难度系数：
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 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWQjOaWueWQkeeahOaXtuWAmeaYrzE4Tg==
- 提示2：IOWPjeaWueWQkeeahOaXtuWAmeaYrzJO
- 提示3：IOS4jeWPr+iDveaYr+WFtuS7luaVsOWAvA==
- 答案：RA==
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