有些物理问题以实际的物理现象为情境·解题的思路不容易找到,需要冷静分析,需要一定的技巧,才能突破.举例说明如下·技巧1 找出题目中隐含条件,画出相应图示例1 宇航员站在一星球表面上的某一高处沿水平方向抛出一个小球,经过时间t,小球落在星球表面,测得抛出点与落地点之间的距离为l,若抛出时初速度增大到2倍,则抛出点 Some physics problems are not easy to find with the actual physics as a situation and problem solving ideas. They need to be analyzed calmly and require certain skills to break through. Examples are as follows. Tip 1 Tips for Finding Implicit Conditions in a Question and Drawing Examples 1 An astronaut stands at a certain height on the surface of a planet and throws a small ball in the horizontal direction. After a time t, the ball falls on the surface of the planet, and the distance between the throwing point and the falling point is measured as l. Thrown at the beginning of the speed increase to 2 times, then throw the point