配套习题- 杠杆（上） -【青果学院】

1/5单选题

难度：

1.如图所示是安置在公路收费站栏杆的示意图，当在A处施加一个力时，可将栏杆逆时针拉起来，它是一根（）

A	省力杠杆
B	费力杠杆
C	等臂杠杆
D	无法确定

正确答案：Qg==

55Sx5Zu+5Y+v55+l5p2g5p2G57uVQeeCueWPs+S+p+eahOi9tOi9rOWKqO+8jOWImUHngrnnmoTliqjlipvoh4Lov5zov5zlsI/kuo7mnaDmnYbph43lipvnmoTpmLvlipvoh4LvvIzmiYDku6XmnaDmnYbmmK/kuIDkuKrotLnlipvmnaDmnYbvvI7lm6DmraTpgInpoblB44CBQ+OAgUTnmoTor7Tms5Xpg73kuI3mraPnoa7vvI7mlYXpgIlC77yO

2/5单选题

难度：

2.

如图所示的生活用具中，使用时属于费力杠杆的是（　　）

A	瓶起子
B	镊子
C	钢丝钳子
D	剪纸剪刀

正确答案：Qg==

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

3/5单选题

难度：

3.

关于杠杆，下列说法正确的是（　　）

A	只有直的硬棒才是杠杆
B	使用杠杆一定省力
C	力臂就是支点到力的作用点的连线
D	既省力又省距离的杠杆是不存在的

正确答案：RA==

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

4/5单选题

难度：

4.

皮划艇是我国奥运优势项目之一，如图所示，比赛中运动员一手撑住桨柄的末端（视为支点），另一手用力划桨．下列说法正确的是（　　）

A	为省力，可将用力划桨的手靠近支点
B	为省力，可将用力划桨的手远离支点
C	为省距离，可将用力划桨的手远离支点
D	将用力划桨的手靠近支点，既能省力又能省距离

正确答案：Qg==

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

5/5单选题

难度：

5.如图所示，下列关于开瓶扳手在开启瓶盖时的几种说法正确的是（）

A	以B为支点的省力杠杆
B	以B为支点的费力杠杆
C	以A为支点的省力杠杆
D	以A为支点的费力杠杆

正确答案：Qw==

55O255uW6LW35a2Q55qE5p2g5p2G56S65oSP5Zu+5aaC5LiL5omA56S677yaQeS4uuaUr+eCue+8jOWKqOWKm+iHguWkp+S6jumYu+WKm+iHgu+8jOaYr+ecgeWKm+adoOadhuOAgjxicj48aW1nIHdpZHRoPTEyNCBoZWlnaHQ9MTM2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTQvQzEvckJBQ0UxVVRzN2VSbndIS0FBQVVkX3ZMSjk0NjkyLnBuZyIgPu+8jOaVhemAiUMu