论文部分内容阅读
一、 考点解读
考点1重力的概念
重力是由于地球的吸引而产生的力.物体所受的重力作用点叫做重心,密度均匀的物体的重心在物体的几何中心.重力的大小可以用弹簧测力计测量;实验表明,物体所受的重力跟它的质量成正比,比值是9.8N/kg,写成公式为G=mg.
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-1-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-2-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-3-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-4-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-5-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-6-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-7-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-8-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-9-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-10-l.jpg)
考点1重力的概念
重力是由于地球的吸引而产生的力.物体所受的重力作用点叫做重心,密度均匀的物体的重心在物体的几何中心.重力的大小可以用弹簧测力计测量;实验表明,物体所受的重力跟它的质量成正比,比值是9.8N/kg,写成公式为G=mg.
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-1-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-2-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-3-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-4-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-5-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-6-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-7-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-8-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-9-l.jpg)
![](https://www.soolun.com/img/pic.php?url=http://img.resource.qikan.cn/qkimages/czsw/czsw200603/czsw20060303-10-l.jpg)