“火箭发射”问题,往往涉及物理学中的“能量、动量以及运动学知识”,综合性比较强,是物理习题中的重点和难点问题.但是,有时候我们可以巧妙地进行一些变换,使问题得到“令人叫绝”的简化. 题目:玩具火箭内充满压缩空气,在发射的时候利用压缩空气从火箭的尾部射出箭身,而使火箭头向前飞行.假如在竖直向上发射的时候,箭头能上升的高度h=16m.现改为另一种发射方式:首先让火箭沿半径为R=4m的半圆形轨道滑行(如 The problem of “launching rockets” often involves “energy, momentum, and kinematics knowledge” in physics. Its comprehensiveness is relatively strong, and it is a key and difficult problem in physical exercises. However, sometimes we can subtly perform some transformations to make The problem was simplifiably simplified. Topic: The toy rocket was filled with compressed air. At launch, compressed air was used to shoot the arrow from the rear of the rocket and the rocket head was moved forward. If it was launched vertically The height at which the arrow can rise is h=16m. Now it is changed to another launch mode: First let the rocket glide along a semi-circular orbit with a radius R=4m (eg,