“直线运动”+圆周运动”四例(高一、高三)

• 作 者: 周灏林
• 机 构: 安徽省太湖徐桥高中 246424
• 出 处: 数理天地(高中版)
• 发表日期: 2005年10期
• 关键词: 直线运动 角速度ω 综合问题 等时性 匀速直线 半径比 请看 切线方向 纸筒 左视图

匀速直线运动和匀速圆周运动是最简单、最常见的两种运动.关于这两种运动的综合问题,渗透运动的合成、运动的周期性、运动的等时性等知识,请看下面四例.1.沿半径方向的直线运动例1在半径为r,以角速度ω逆时针匀速转动的水平圆盘边缘,有一人正用汽枪射击位于圆心O处的气球,若子弹从枪口射出的速度为v,则枪口的方向应()

Uniform linear motion and uniform circular motion are the simplest and most common two kinds of motion. For the synthesis of these two types of motion, the synthesis of infiltration motion, the periodicity of motion, the isochronism of motion, etc., please see the following four cases. .1. Linear motion along the radial direction Example 1 At the edge of a horizontal disc with a radius of r and a uniform counterclockwise rotation at an angular velocity ω, one person is using a gas gun to fire a balloon at the center O, if the bullet is ejected from the muzzle The speed is v, then the direction of the muzzle should be ()