1　问题的提出中学物理教学中 ,我们做了不少基本实验 ,测过许多基本的物理量 .由于多方面的原因 ,有一些同样重要的物理量却很少被测量 ,甚至尚未被测量过 ,我们称这类物理量为非常测物理量 .比如 ,两物体碰撞的时间、平均冲力等 .非常测物理量对教学很有用 ,在此 ,笔者设计了 1 Problems raised During the middle school physics teaching, we did a lot of basic experiments and measured many basic physical quantities. Due to various reasons, there are some equally important physical quantities that are rarely measured or even not measured. We say This kind of physical quantity is a very physical quantity measurement. For example, the time of two objects colliding, the average impulse, etc. Very measurable physical quantities are very useful for teaching. Here, the author has designed