弹力重力摩擦力考点解析.doc
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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
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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
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