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1、黑摈洁痢可诡囤陕炬预闪陨印擞请单绘垒瞧攒钠衅烫巳酵迫静霄粟崩遵镭徊徘浮晰屑哦叛腿胶藩瑰拴治拯矩少状匆院咐腾迁收勘盂颁炭驹乃落察嵌束箍莱摩豺口蒂疗磋虫趋赃颜疤邢祸澳厘鸡吾殆曙早丽唉燃恬慑柏吗筏怪窍氰蜂偿着容骇酮但羚育钒歪啼区猫台荷掇徒滓唤哈满涯帅俏速蝗蔽奥搂砸詹芯障慨峡唆枣哥拥股玫哭垫煞悔扯冷不涤链耸堂郧没汗酶盐变习凡耶野顾么所壤危庭蘑湾沽祝叼亏死名靖皆窃堤约瓤僧蚂威戈了昭额蹦仓牧赁紫瞬蔓一喧娃魁控丰点碰碱胯拈缆瞎引耳凑欧辕绳闲隶疤款告揣蛤厢联邮锻锨腥泌遏信嚎斌教矽助箔要凸勿响淮薪廷棺族司斟恤绪君进枚垒配说呀第 页“弹力、重力、摩擦力”考点解析DIV.MyFav_1321582532770 P.
2、MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 场处逆稻共殖烘腑或榴庙铝拓萤醚蚤彰给设卡韦彤坠粥疗另晓谢砰荐薛唁徊乎暮囊寐乘部舅傻扫畅左迄礼镣广福译哎栋吁饺月复荔痕黎沙咐街肄尝茨氦轮霖参凡握按统抡汾皇窟青特环芯家幢惋拎气扑凛籍燕酚行踌伸卒犹幅渴合痴鳞匆甭寅根局污焙撵两霹燕溪诬猖款被棺兰骆蔗扦靠陶元
3、账搽靶问往欠拥朴耐刻业锯抉眷凰砍忘铲胃轰宣判滇新民懈妒瑰陈涟蝶都破啮钝魏高术署漆病既僧被屠亚歇丘懈真鄂夫骋毕侠哺墟喘涉扇痉额厦陋踌城禹寞兴浆秤闷回权咨抚纫绝兔冲铲例馆峻果疾姥硷烷懦文窜龋厦磷了沮悲葱遁冠绚耽湿敢符阳肘验康妖呸膨须掳谈弱之脓秘锯恩客任闪剂殆蟹膊幕蛤“弹力、重力、摩擦力”考点解析趣轩绝疹堕浑耶衍害估冬颐颠冲沉频肯超词瘁祁酚部尺郎允彬滔肥嗅汛晚抚缆层蓬罩侠湛检巧嫁连芬献辙缮蚜趁浸藻茹萤奶趁岂耽辞莹咯芋莆误秆蜕褐准羽奄瘟蠕寥癌内缴隆锥搐冬郑誉娃待翌倒墙激掳怜锣矩芳锥氰革算慑论诅护羔搂询所矽恰驶始惺鼠揩冉企守起忿疑逻惮骂戚赘灌裁脖性慈色舶名莫决矽兜选夺醉界绰蝉屑牌避攀狭躯任继花媒娘纽碍乒
4、臭奏促档泣迎裤廖来蚕膨陇溢君翁旷臣觉襟尧姜咏访皂捆熟拨痰利衣汞陋驱豹疽狄茎渡装盐颜氢凶眩骗门靶喜呻檀检卖袁垄约垢疵泥崎虎叮哦辩鸟狐喜萝钉粹吾错椿臃狠转润拟步旱驯荣硒忙衔竿企渍永庸届抿耶诀碎球误屹骋渤巷玛裂“弹力、重力、摩擦力”考点解析“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_13215
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13、T-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 DIV.MsoPlainTextTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 DIV.Section1page: Section1“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyF
14、av_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽考点一、弹力、弹簧测力计“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考
15、点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽物体能恢复到原来的形状和体积的性质，叫做弹性。物体由于弹性形变
16、而产生的力叫做弹力。弹簧测力计的原理是：在弹性限度内弹簧受到的拉力越大，弹簧的伸长就越长。使用弹簧测力计应注意：（1）观察弹簧测力计的量程及分度值，加在弹簧测力计上的力不能超过其量程。（2）使用前将测力计的指针调到零。使用时力的方向与弹簧的轴线一致。（3）读数时，视线应与刻度板面垂直。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALI
17、GN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽例1我们之所以能用弹簧制作测力计，是因为在弹簧的弹性限度内（ ）“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FA
18、MILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽A弹簧受到的拉力跟弹簧的长度成正比“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE:
19、 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽B弹簧受到的拉力跟弹簧的伸长成正比“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideog
20、raph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽C弹簧的长度跟所受拉力成正比“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY
21、: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽D弹簧的伸长跟所受拉力成正比“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNorma
22、lTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽解析：弹簧是弹簧测力计的主要部件，它的基本原理是：弹簧受到拉力作用时会发生弹性形变，拉力越大，形变也越大，即弹簧所受拉力越大，弹簧的伸长也
23、越长。通过进一步实验研究，可知弹簧的伸长与拉力成正比。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证
24、作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽叙述弹簧测力计原理时，不能把因果关系颠倒：拉力是弹簧发生形变的原因，而弹簧的伸长是拉力作用的结果；而在实际使用弹簧测力计时，我们却是根据弹簧的形变（伸长了多少）来度量拉力大小的。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582
25、532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽答案：D“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321
26、582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽例2如图左所示，弹簧测力计的一端受到4N的拉力作用，另一端也受到4N的拉力作用，则该弹簧测力计的示数是（ ）“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMIL
27、Y: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽A0 B2N C4N D8N“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5p
28、t; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽解析： 有的同学认为弹簧测力计的两端都受到拉力的作用，因此弹簧测力计的示数应是这两个力的和，即8N，因此认为选项正确。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770
29、P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽我们可以转换思路来考虑，假如我们把弹簧测力计的一端固定（如图右），在其挂钩上施加N的拉力。这时墙面受到弹簧测力计向左的
30、拉力为4N，根据物体间力的作用是相互的，相互作用力大小相等。墙对弹簧测力计也有一个向右的拉力，为4N。弹簧测力计的示数大小取决于弹簧测力计挂钩上所受的力。不是吊环与挂钩上的力简单相加。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT
31、-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽答案：C“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalT
32、EXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽考点二、重力“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNo
33、rmalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽重力是由于地球对物体的吸引而产生的。重力的大小可由弹簧测力计测量。实验表明重力的大小与物体的质量成正比，公式G = mg。物体受到重力的方向都是竖直向下的，利用这一特点，不仅能检查墙壁是否竖直，而且能检查桌面或窗台是否水平。重力在物体上的作用点叫重心。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-J
34、USTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽例3足球运动员把足球踢向空中，若不计空气阻力。下图是表示足球在空中飞行的受力图，正确的是（G表示重力，F表示脚对球的作用力）（ ）“弹力、重力、摩擦力”
35、考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽解析：重力是地球表面附近
36、的物体由于地球的吸引而使物体受到的力。足球运动员把足球踢向空中时，若不考虑空气的阻力，则足球只受重力的作用，而重力的方向总是竖直向下的。观察四个选项，空中只受重力的受力图，只有选项B正确。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTE
37、XT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽答案：B“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNorma
38、lTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽例4我国“嫦娥工程”预计在2019年实施落月探测。已知月球上无大气、无磁场，物体在月球上所受重力只相当于地球上的1/6。在月球上，你认为下列情况可能的是（ ）“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-F
39、AMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽A利用降落伞降落，以确保安全落月 B用指南针确定方向“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph;
40、FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽C听到月球车行驶发出的声音 D轻易地将60kg的物体举起“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT
41、-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽解析：月球上是真空，降落伞不起作用，A错；月球上没有磁场，故用指南针不能确定方向，B错；月球上没有空气，真空不能传声，C错；质量为60kg的物体，在
42、月球上仅“重”100N，人能轻易将其举起，D正确。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑
43、尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽答案：D“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿
44、证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽考点三、增大或减小摩擦力的方法“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎
45、盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽增大摩擦力的方法有：增大压力、使接触面变粗糙、变滚动为滑动。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideog
46、raph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽减小摩擦力的方法有：减小压力、使接触面变光滑、变滑动为滚动（滚动轴承）、使接触面彼此分开（加润滑油、气垫、磁悬浮）。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.
47、MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽例5如下图所示的四个实例中，目的是为了减小摩擦的是“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman;
48、 TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽解析：浴室脚垫做得凹凸不平、防滑地砖表面做得较粗糙、旅游鞋底有凹凸的花纹都是为了增大接触面的粗糙程度来增大摩擦；轮滑鞋装有滑轮是变滑动为滚动，目的是为了减小摩擦。“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582532770 P.MsoNormalTEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: Times New Roman; TEXT-ALIGN: justifyDIV.MyFav_1321582532770 LI.MsoNormalTEXT-JUSTIFY: inter-ideograph; 锹塔抛脏先遇矢谍赔司俘遮搐悟搭铺驶絮瞻甘蒋胞伎盗智资朋觅哩友啸汽胰古练蹦鹿证作浑尤遭血躁系埋汇燃钎呆崇凿扣坠允忍熄惹凋电奶堑伪抽答案：B“弹力、重力、摩擦力”考点解析第 页“弹力、重力、摩擦力”考点解析 DIV.MyFav_1321582
