中学生网络课堂本课配套习题挑战模式1/5
在竖直向下的压力作用下，木块浸没在水中，木块的下表面和上表面受到水的压力分别为F1=5N，F2=2N，则水对木块的浮力是（ ）
| A: 2N |
| B: 3N |
| C: 5N |
| D: 7N |
- 提示1：PHA+RjxzdWI+5rWuPC9zdWI+PUY8c3ViPuWQkeS4ijwvc3ViPi1GPHN1Yj7lkJHkuIs8L3N1Yj48L3A+
- 答案：Qg==
PHA+5bey55+l77yaRjxzdWI+MTwvc3ViPj01Tu+8jEY8c3ViPjI8L3N1Yj49Mk7vvIw8YnI+5pyo5Z2X5Y+X5Yiw5rC055qE5rWu5YqbRjxzdWI+5rWuPC9zdWI+PUY8c3ViPjE8L3N1Yj4tRjxzdWI+Mjwvc3ViPj01Ti0yTj0zTjxicj7mlYXpgIlCLjxicj48L3A+
本课配套习题挑战模式2/5
| A: 4N |
| B: 6N |
| C: 14N |
| D: 7N |
- 提示1：IEY8c3ViPua1rjwvc3ViPj1GPHN1Yj7lkJHkuIo8L3N1Yj4tRjxzdWI+5ZCR5LiLPC9zdWI+
- 答案：Qw==
5qC55o2u5rWu5Yqb5Lqn55Sf55qE5Y6f5Zug77yaRua1rj1G5ZCR5LiKLUblkJHkuIs8YnI+5YiZRjxzdWI+5ZCR5LiKPC9zdWI+PUY8c3ViPua1rjwvc3ViPitGPHN1Yj7lkJHkuIs8L3N1Yj49MTBOKzROPTE0Ti4gPGJyPuaVhemAiUMuIA==
本课配套习题挑战模式3/5
用细绳将一物体系在容器底部，若物体下表面受到水向上的压力为10N，上表面受到水向下的压力为5N，则物体受到水对它的浮力为（ ）
| A: 4N |
| B: 5N |
| C: 6N |
| D: 15N |
- 提示1：PHA+RjxzdWI+5rWuPC9zdWI+PUY8c3ViPuWQkeS4ijwvc3ViPi1GPHN1Yj7lkJHkuIs8L3N1Yj48L3A+
- 答案：Qg==
PHA+5qC55o2u5rWu5Yqb5Lqn55Sf55qE5Y6f5Zug77yaRua1rj1G5ZCR5LiKLUblkJHkuIs8YnI+5YiZRjxzdWI+5rWuPC9zdWI+PUY8c3ViPuWQkeS4ijwvc3ViPi1GPHN1Yj7lkJHkuIs8L3N1Yj49MTBOLTVOPTVOLjxicj7mlYXpgIlCLjwvcD4=
本课配套习题挑战模式4/5
一物体漂浮在水中，物体下表面受到水向上的压力为15N，则物体受到水对它的浮力为（ ）
| A: 1N |
| B: 5N |
| C: 10N |
| D: 15N |
- 提示1：PHA+RjxzdWI+5rWuPC9zdWI+PUY8c3ViPuWQkeS4ijwvc3ViPi1GPHN1Yj7lkJHkuIs8L3N1Yj48L3A+
- 答案：RA==
PHA+5qC55o2u5rWu5Yqb5Lqn55Sf55qE5Y6f5Zug77yaRua1rj1G5ZCR5LiKLUblkJHkuIs8YnI+5YiZRjxzdWI+5rWuPC9zdWI+PUY8c3ViPuWQkeS4ijwvc3ViPi1GPHN1Yj7lkJHkuIs8L3N1Yj49MTVOLTBOPTE1Ti48YnI+5pWF6YCJRC48L3A+
本课配套习题挑战模式5/5
| A: 10N |
| B: 25N |
| C:20N |
| D: 50N |
- 提示1：IEY8c3ViPua1rjwvc3ViPj1GPHN1Yj7lkJHkuIo8L3N1Yj4tRjxzdWI+5ZCR5LiLPC9zdWI+
- 答案：RA==
5qC55o2u5rWu5Yqb5Lqn55Sf55qE5Y6f5Zug77yaRua1rj1G5ZCR5LiKLUblkJHkuIs8YnI+5YiZRjxzdWI+5ZCR5LiKPC9zdWI+PUY8c3ViPua1rjwvc3ViPitGPHN1Yj7lkJHkuIs8L3N1Yj49MzVOLTE1Tj01ME4uIDxicj7mlYXpgIlELiA=
