17寒-初二物理目录第一讲杠杆..........................................................................................................................................2第二讲杠杆的平衡条件..................................................................................................................13第三讲杠杆的应用..........................................................................................................................26第四讲滑轮......................................................................................................................................36第五讲简单机械的应用..................................................................................................................46第六讲机械功..................................................................................................................................55第七讲机械功率..............................................................................................................................63第八讲机械能..................................................................................................................................72第九讲简单机械和功测试..............................................................................................................82第十讲简单机械和功拓展练习.......................................................................................................87第十一讲温度与温标......................................................................................................................94第十二讲热量比热容（一）.......................................................................................................105第十三讲热量比热容（二）.......................................................................................................116第十四讲寒假总复习......................................................................................................................128课后作业140第一讲杠杆.......................
