一个容易错解的问题

A Misleading Problem

分析了一个抛出点和落地点不在同一水平面内的运动学问题容易错解的原因，给 出了要达到一定水平抛射距离所需最小初速度的正确求法。

After analyzing the causes of a misleading kinematics problem wity throw point and point of fall at different levels, tbe thesis supplies a correct resolution of initial velocity it needs to reach a project distance at a cerlain level.