中学生网络课堂本课配套习题挑战模式1/5
浮力产生的原因是由于
| A: 液体（或气体）对物体有压力 |
| B: 液体（或气体）对物体有压力差 |
| C: 液体（或气体）有质量 |
| D: 物体对液体（或气体）有压力 |
- 提示1：PHA+54mp5L2T5pS+5YWl5ray5L2T5oiW6ICF5rCU5L2T5Lit6YO95Lya5Y+X5Yiw5rWu5Yqb5L2c55So44CCPGJyPjwvcD4=
- 提示2：PHA+5rWu5Yqb5piv54mp5L2T5Y+X5Yiw5ray5L2T5oiW6ICF5rCU5L2T5a+554mp5L2T55qE5LiK5LiL5Y6L5Yqb5beuPGJyPjwvcD4=
- 提示3：PHA+55yL5Yiw6L+Z5Liq5o+Q56S677yM6K+05piO5L2g5rKh5oCd6ICD5YmN5Lik5Liq5o+Q56S644CCPGJyPjwvcD4=
- 答案：Qg==
PGRpdj7mta7lipvkuqfnlJ/nmoTljp/lm6DmmK/vvJrniankvZPmlL7lhaXmtrLkvZPmiJbogIXmsJTkvZPkuK3vvIzlj5fliLDmtrLkvZPmiJbogIXmsJTkvZPlr7nniankvZPlkJHkuIrlkozlkJHkuIvnmoTljovlipvlt648L2Rpdj4=
本课配套习题挑战模式2/5
| A: 只有浸在液体里的物体才受到浮力，在空气中的物体不受浮力 |
| B: 乒乓球和玻璃球均浸在水中，则乒乓球受到浮力，玻璃球不受浮力 |
| C: 物体浸在液体中，由于受到浮力，物体的重力要变小 |
| D: 浮力的方向竖直向上 |
- 提示1：IOeJqeS9k+WcqOawlOS9k+S4reS5n+WPl+WIsOa1ruWKmw==
- 提示2：IOS7u+S9lea1uOayoeWcqOa2suS9k+aIluawlOS9k+S4reeahOeJqeS9k+mDveWPl+WIsOa1ruWKmw==
- 提示3：IOmHjeWKm+etieS6jui0qOmHj+S5mOS7pWfvvIzlkozniankvZPmta7lipvml6DlhbM=
- 答案：RA==
PGRpdj7niankvZPkuI3ku4XlnKjmtrLkvZPkuK3lj5fliLDmta7lipvvvIzlnKjmsJTkvZPkuK3kuZ/lj5fliLDmta7lipvjgILph43lipvlpKflsI/nlLHotKjph4/lkoxn5Yaz5a6a44CC5rWu5Yqb55qE5pa55ZCR56uW55u05ZCR5LiKPC9kaXY+
本课配套习题挑战模式3/5
为在海洋中开采石油而建造钻井平台时，必须向海底打入圆柱形铁桩. 铁桩垂直从水面上逐渐下水直至全部进入水下紧密的泥土中，当铁桩全部进入泥土中，铁桩还受到浮力么
| A: 受到浮力，而且浮力很大 |
| B: 受到浮力，但浮力很小 |
| C: 不受浮力 |
| D: 无法确定 |
- 提示1：PHA+5ZyG5p+x5b2i6ZOB5qGp5Y+q5Y+X5Yiw5rC05a+55a6D55qE5rC05bmz5Y6L5YqbPC9wPg==
- 提示2：PHA+5rWu5Yqb562J5LqO5ray5L2T5oiW6ICF5rCU5L2T5a+554mp5L2T5ZCR5LiK5ZKM5ZCR5LiL55qE5Y6L5Yqb5beuPC9wPg==
- 提示3：PHA+5Zug5Li66ZOB6KOF5a+C5a+e5Yiw5rOl5Zyf5Lit77yM5ZyG5p+x5b2i6ZOB5qGp5LiN5Y+X5rC05a+56ZOB5qGp5ZCR5LiK55qE5Y6L5YqbPC9wPg==
- 答案：Qw==
PGRpdj7niankvZPlj5fliLDnmoTmta7lipvmmK/mtrLkvZPmiJbogIXmsJTkvZPlr7nniankvZPlkJHkuIrlkozlkJHkuIvnmoTljovlipvlt67vvIzlvZPpk4Hoo4Xov5vlhaXms6XlnJ/kuK3nmoTml7blgJnvvIzpk4Hoo4XlupXpg6jkuI3lj5fmsLTnmoTljovlipvvvIzmiYDku6XmsLTmsqHmnInlr7npk4Hoo4XkuqfnlJ/lkJHkuIrnmoTmta7lipvjgII8YnI+PC9kaXY+
本课配套习题挑战模式4/5
长方体物块浸没在水中，所受浮力是10N，下表面受到的压力是15N，上表面受到的压力是( )
| A:
25N |
| B:
5N |
| C:
30N |
| D:
0N |
- 提示1：CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA8cD7mta7lipvnrYnkuo7lkJHkuIrnmoTljovlipvlh4/ljrvlkJHkuIvnmoTljovlips8L3A+CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA=
- 提示2：CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA8cD7kuIvooajpnaLlj5fliLDljovlipvmmK8xNU7vvIzmta7lipvmmK8xME7vvIzkuKTogIXlgZrlt648L3A+CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA=
- 提示3：CiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA8cD7kuI3opoHov5nkuYjmh5LvvIHvvIHorqHnrpfkuIDkuIvlho3nnIvnrZTmoYjvvIE8YnI+PC9wPgogICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg
- 答案：Qg==
PGRpdj4xNU4tMTBOPTVOPC9kaXY+
本课配套习题挑战模式5/5
| A: 它的上、下表面都受到水的压强，上表面比下表面受到的压强大 |
| B: 上、下表面都受到水的压力，这两个表面受到的压力相等 |
| C: 下表面受到水的压强比上表面大 |
| D: 上、下表面受到的水的压力是一对平衡力 |
- 提示1：IOWboOS4uua1uOayoe+8jOS4iuS4i+ihqOmdoumDveWPl+WIsOawtOeahOWOi+WKm+WSjOWOi+W8ug==
- 提示2：IOS4i+ihqOmdouWPl+WIsOWOi+WKm+WSjOWOi+W8uuWkp+S6juS4iuihqOmdouWPl+WIsOWOi+WKm+WSjOWOi+W8ug==
- 提示3：IOS4i+ihqOmdouWOi+WKm+WHj+WOu+S4iuihqOmdouWOi+WKm+etieS6jua1ruWKm++8jOa1ruWKm+WSjOmHjeWKm+aYr+S4gOWvueW5s+ihoeWKmw==
- 答案：Qw==
PGRpdj7lm6DkuLrmtbjmsqHvvIzkuIrkuIvooajpnaLpg73lj5fliLDmsLTnmoTljovlipvlkozljovlvLrvvIzkuIvooajpnaLlj5fliLDljovlipvlkozljovlvLrlpKfkuo7kuIrooajpnaLlj5fliLDljovlipvlkozljovlvLrvvIzkuIvooajpnaLljovlipvlh4/ljrvkuIrooajpnaLljovlipvnrYnkuo7mta7lipvvvIzmta7lipvlkozph43lipvmmK/kuIDlr7nlubPooaHlips8L2Rpdj4=
