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<HTML><HEAD><TITLE>new</TITLE><META content="text/html; charset=gb2312" http-equiv=Content-Type><LINK href="text.css" rel=stylesheet type=text/css><META content="Microsoft FrontPage 4.0" name=GENERATOR></HEAD><body leftmargin="15"><center><b><br>2 沖量</b></center> <table border="0" cellpadding="0" cellspacing="0" width="560"> <tr> <td width="20"><b><font color="#0000FF">一、</font></b></td> <td width="540"><b><font color="#0000FF">力的沖量</font></b></td> </tr> <tr> <td width="20"></td> <td width="540"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="54%">定義：力在時間上的累積效應。</td> <td width="46%" rowspan="5"> <p align="center"><img border="0" src="pic/3052_24.GIF" width="186" height="178"></td> </tr> <tr> <td width="54%"> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td>1.常力 </td> <td><img border="0" src="pic/3052_5F25.GIF" width="58" height="28"></td> </tr> </table> </td> </tr> <tr> <td width="54%"> <table border="1" cellpadding="0" cellspacing="0" bordercolor="#008080" width="282"> <tr> <td width="278"> <table border="0" cellpadding="0" cellspacing="0" width="285"> <tr> <td width="105">問題：圖中重力</td> <td width="22"><img border="0" src="pic/3052_26.GIF" width="22" height="28"></td> <td width="49">和反力</td> <td width="18"><img border="0" src="pic/3052_27.GIF" width="18" height="26"></td> <td width="81">有沖量嗎？</td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td width="54%">2.任意力</td> </tr> <tr> <td width="54%"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="25%">元沖量：</td> <td width="25%"><img border="0" src="pic/3052_28.GIF" width="68" height="28"></td> <td width="25%"> <p align="center">沖量：</td> <td width="25%"><img border="0" src="pic/3052_29.GIF" width="90" height="46"></td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td width="20"><b><font color="#0000FF">二、</font></b></td> <td width="540"><b><font color="#0000FF">力系的沖量</font></b></td> </tr> <tr> <td width="20"></td> <td width="540"> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td><img border="0" src="pic/3052_210.GIF" width="138" height="46"></td> <td> 故力系的沖量等于主矢的沖量。</td> </tr> </table> </td> </tr> <tr> <td width="20"><b><font color="#0000FF">三、</font></b></td> <td width="540"><b><font color="#0000FF">內力的沖量</font></b></td> </tr> <tr> <td width="20"></td> <td width="540">恒為零</td> </tr> <tr> <td width="20"></td> <td width="540"></td> </tr> <tr> <td width="560" colspan="2"> <p align="center"> <a href="3052_1.htm"><font color="#FF6666">[ 上一節 ]</font></a> <a href="3052_3.htm"><font color="#00CC00">[ 下一節 ]</font></a> </td> </tr> </table> </BODY></HTML> ?? 快捷鍵說明
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