本课配套习题挑战模式1/5
A: 省力杠杆 |
B: 费力杠杆 |
C: 等臂杠杆 |
D: 无法确定 |
- 提示1:5Yqo5Yqb6IeC5bCP5LqO6Zi75Yqb6IeC55qE5p2g5p2G5piv6LS55Yqb5p2g5p2G
- 答案:Qg==
55Sx5Zu+5Y+v55+l5p2g5p2G57uVQeeCueWPs+S+p+eahOi9tOi9rOWKqO+8jOWImUHngrnnmoTliqjlipvoh4Lov5zov5zlsI/kuo7mnaDmnYbph43lipvnmoTpmLvlipvoh4LvvIzmiYDku6XmnaDmnYbmmK/kuIDkuKrotLnlipvmnaDmnYbvvI7lm6DmraTpgInpoblB44CBQ+OAgUTnmoTor7Tms5Xpg73kuI3mraPnoa7vvI7mlYXpgIlC77yO
本课配套习题挑战模式2/5
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 |
- 提示1:PHA+5p2g5p2G55qE5YiG57G75YyF5ous5Lul5LiL5Yeg56eN77ya4pGg55yB5Yqb5p2g5p2G77yM5Yqo5Yqb6IeC5aSn5LqO6Zi75Yqb6IeC77yb4pGh6LS55Yqb5p2g5p2G77yM5Yqo5Yqb6IeC5bCP5LqO6Zi75Yqb6IeC77yb4pGi562J6IeC5p2g5p2G77yM5Yqo5Yqb6IeC562J5LqO6Zi75Yqb6IeCPC9wPg==
- 答案:Qg==
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
本课配套习题挑战模式3/5
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 |
- 提示1:PHA+5p2g5p2G5piv5Zyo5Yqb55qE5L2c55So5LiL5Y+v5Lul57uV5LiA5Zu65a6a54K56L2s5Yqo55qE56Gs5qOSPC9wPg==
- 答案:RA==
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
本课配套习题挑战模式4/5
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 |
- 提示1:PHA+5Zyo5YiS5qGo55qE6L+H56iL5Lit5Y+v5oqK5qGo55yL5oiQ5LiA5Liq6LS55Yqb5p2g5p2GPC9wPg==
- 提示2:PHA+5L2/55So5p2g5p2G5pe277yM6KaB55yB5Yqb77yM5bCx6KaB6LS56Led56a7PC9wPg==
- 答案:Qg==
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
本课配套习题挑战模式5/5
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 |
- 提示1:5pSv54K55Li6QQ==
- 提示2:6Zi75Yqb5piv55O255uW5a+5QueCueeahOS9nOeUqOWKmw==
- 答案:Qw==
55O255uW6LW35a2Q55qE5p2g5p2G56S65oSP5Zu+5aaC5LiL5omA56S677yaQeS4uuaUr+eCue+8jOWKqOWKm+iHguWkp+S6jumYu+WKm+iHgu+8jOaYr+ecgeWKm+adoOadhuOAgjxicj48aW1nIHdpZHRoPTEyNCBoZWlnaHQ9MTM2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTQvQzEvckJBQ0UxVVRzN2VSbndIS0FBQVVkX3ZMSjk0NjkyLnBuZyIgPu+8jOaVhemAiUMu