论文部分内容阅读
子弹射穿或射中物体的习题是高中物理中学生普遍感到难以理解和掌握的教学难点.它的类型较多.知识面较广,综合性较强.对子弹射穿或射中物体的习题:第一:要弄清在子弹射穿或射中物体的过程中子弹对地的位移和物体对地的位移.第二:要明确在子弹射穿或射中物体的过程中物体对子弹的作用和子弹对物体的作用是作用与反作用.所以它们的大小相等.方向相反,在同一直线上.第三:子弹射穿或射中物体时所需要的时间可以对子弹列动量定理求出.第四:子弹射穿或射中物体时损失的动能等于物体对子弹的摩擦力做的负功.或者根据动能定理求出.木
The problem of bullets shooting through or hitting an object is a teaching difficulty that high school physics students generally find difficult to understand and master. It has many types, a wide range of knowledge, and a strong comprehensiveness. Exercises on shooting bullets or hitting objects: The first is to understand the displacement of the bullet to the ground and the displacement of the object to the ground during the bullet’s shoot-through or shooting of an object. Secondly, it is necessary to clarify the role of the object in the bullet during the shooting or shooting of the bullet by the bullet. The effect of the bullet on the object is the action and reaction. So their size is equal. The direction is opposite, in the same line. Third: The time required for the bullet to shoot through or hit the object can be obtained by the bullet momentum theorem. : The kinetic energy lost when a bullet shoots or hits an object is equal to the negative work done by the object on the friction of the bullet. Or based on the kinetic energy theorem.