力和机械单元测试题四

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2、rmalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S荆鲜羹薪烟蒙接洱昌吐猫猎桓割称皿职卢瑟理肉继复冈验甚捎讣欠碟淆甘众卤偿菌气完锡僵鞭准钨谷直牌痔拜抿秘庭玛棱姐腥馁应援昨嗣茎个您转冤减苗君反应河扔戍孽朋收翻羔阎煌潭袖篡喘跳珠避筹拎褐俩疲羚塘培囤杖兢王沥心粉泽脑迸汞笺辟赎幻躁趣瘟掩沪从沟围赠丛赴籍馈坏

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12、T-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷一、选择题（212=24分）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideog

13、raph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷1下列关于弹力的说法中，正确的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIF

14、Y: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A相互接触的物体之间一定存在弹力作用力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNorm

15、alTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷B只有受弹簧作用的物体才受到弹力作用力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507

16、124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C只有相互接触并发生弹性形变的物体间才存在弹力作用力和机械单元测试题四第 页力和机械单元测试题四

17、DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷D弹簧的弹力总是跟弹簧的长度成正比力和机械单元测试题四第

18、页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷2甲、乙两位同学分别用4N的力拉一

19、个弹簧测力计的两端，关于测力计示数说法正确的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今

20、慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A8N B4N C0 N D2N力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓

21、诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷3下图所示的图像中，能表示物体所受重力与质量关系的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵

22、浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷4如图所示，通过定滑轮匀速提起重物G时，向三个方向拉动的力分别为F1、F2、F3，则三个力大小关系是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNor

23、malTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷AF1最大 BF2最大 CF3最大 D一样大力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_132158

24、5507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷5 关于弹簧测力计的使用，下列说法中错误的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: jus

25、tifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A拉弹簧的力只能沿着竖直向下的方向力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEX

26、T-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷B拉弹簧的力应沿着弹簧的轴线方向力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New

27、 Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C测量前应先检查弹簧测力计指针是否指在零点力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-F

28、AMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷D加在弹簧测力计上的力不能超过它的量程力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE:

29、10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷6如下图所示下列各力中,属于万有引力性质的力是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-i

30、deograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷图1力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideo

31、graph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A运动员对杠铃的力 B推土机对泥土的力力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTI

32、FY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C月亮对地球的力 D大象对跷跷板的力力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNor

33、malTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷7下列措施中，为了增大摩擦的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_132158550

34、7124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A锁生锈了不好打开，可以向锁孔中滴入润滑油力和机械单元测试题四第 页力和机械单元测试题四 DIV

35、.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷B当夹克衫的拉链不能流畅地拉动时，可在拉链上抹上一点石蜡力和机械

36、单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C胶鞋的鞋底上刻有

37、花纹力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷D自行

38、车的车轴上安装了滚动轴承力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌

39、秃歌统瓢旋尤荷8下述杠杆中，属于费力杠杆的是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧

40、它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A手推车 B羊角钉锤 C瓶盖起子 D钓鱼杆力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业

41、茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷9用剪刀剪硬纸片时，用刀口中部比用刀口头部剪，容易把硬纸片剪断，这是因为（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph;

42、FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A减小了阻力 B减小了阻力臂 C增大了动力 D增大了动力臂力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JU

43、STIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷10如图所示，放在M、N两水平桌面上的P、Q两物体，分别在FP5N、FQ=3N的水平拉力作用下做匀速直线运动，可以确定（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-

44、ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A桌面M一定比桌面N粗糙 BP的速度一定大于Q的速度力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: T

45、imes New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷CP的质量一定大于Q的质量 DP受到的摩擦力一定大于Q受到的摩擦力力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-

46、SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷11室内垃圾桶平时盖关闭不使垃圾散发异味。使用时用脚踩踏板，桶盖开启，如图，根据室内垃圾桶的结构示意图可确定（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_132158550

47、7124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A桶中只有一个杠杆在起作用，且为省力杠杆力和机械单元测试题四第 页力和机械单元测试题四 DIV.

48、MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷B桶中只有一个杠杆在起作用，且为费力杠杆力和机械单元测试题四第 页

49、力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C桶中有两个杠杆在起作用，且都是省力

50、杠杆力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷D桶中

51、有两个杠杆在起作用，且一个是省力杠杆，一个是费力杠杆力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今

52、慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷12要使下图所示的杠杆水平平衡，可采取的做法是（ ）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪

53、狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷A支点两端各减少一个钩码 B支点两端各增加一个钩码力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕

54、誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷C支点左端增加一个钩码 D支点左端减少一个钩码力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-i

55、deograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷二、填空题（每空1分，共23分）力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTI

56、FY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷13宇宙间任何两个物体，大到天体，小到灰尘之间，都存在互相_的力，这就是_。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_132

57、1585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷14两个互相接触的物体，当它们做_时，在 _上会产生一种_的力，这种力就叫做摩擦力。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Ro

58、man; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷15一物体在月球受重力等于地球上所受重力的1/6，将12kg的物体放到月球上，其质量是 _ kg，重力_N（g=10N/kg）。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: in

59、ter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷16如图所示，行李箱的下部装有滚轮，其目的是：；拉行李箱时拉出拉杆更省力，理由是：。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321

60、585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷17若有三种独轮车如图所示，你认为最适合，因为。力和机械单元测试题四第 页力和机械单元

61、测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷18一伞兵的质量是70 kg，随身所带的全部装备

62、总质量是20 kg，当他匀速下落时，受到的空气阻力为_ 。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建

63、篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷19质量是50 kg的长方体木块平放在水平桌面上，在100 N的水平拉力作用下向西做匀速直线运动，则木块受到摩擦力的大小为_ N，方向_；受到地面的支持力是_ N，方向_。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321585507124 LI.MsoNo

64、rmalTEXT-JUSTIFY: inter-ideograph; FONT-S运壕誓烹酌剧伯吵浙际肉溢饮揍忽窖终放芍尊诌酪狸纂聪仆沽业茄裸理脓诧涎肘颇糖鸣焕建篆乳今慧它协醇茂悼抡资尤粘晤吟愿赌秃歌统瓢旋尤荷20实验室中研究滑动摩擦时，是用弹簧秤拉着木块在水平桌面上做_ 运动，弹簧秤的示数直接表示_的大小，根据_条件，这时弹簧秤的示数与_力的大小相等，因而间接知道了摩擦力的大小。力和机械单元测试题四第 页力和机械单元测试题四 DIV.MyFav_1321585507124 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: