一道運(yùn)動(dòng)學(xué)競(jìng)賽題的多種解法探究
——以第37屆全國(guó)中學(xué)生物理競(jìng)賽預(yù)賽第12題為例
摘 要：以第37屆全國(guó)中學(xué)生物理競(jìng)賽預(yù)賽第12題為例，分析題目的考查點(diǎn)，展示題目原解，依據(jù)不同物理原理和方法求解該競(jìng)賽題，幫助學(xué)生學(xué)習(xí)領(lǐng)會(huì)同一問(wèn)題分別運(yùn)用牛頓運(yùn)動(dòng)定律、圖像法、動(dòng)能定理、動(dòng)量定理進(jìn)行求解的思路和方法，培養(yǎng)和提高學(xué)生解決問(wèn)題的能力，培養(yǎng)學(xué)生的科學(xué)思維。
關(guān)鍵詞：圖像法；動(dòng)能定理；動(dòng)量定理
Research on Multiple Solutions to A Kinematics Competition Problem
—Taking the 12th Question of the Preliminary Round
of the 37th National High School Physics Competition as an Example
Li Yanqi Wang Zhixiu Bai Xue Zheng Qinhong
College of Physics and Electronic Information，Yunnan Normal University YunnanKunming 650500
Abstract：Taking the 12th question of the 37th National Physics Competition for Middle School Students as an example，this study analyzes the examination points of the question，displays the original solution of the question，solves the competition question based on different physics principles and methods，helps students learn and understand the ideas and methods of using Newton's laws of motion，image method，kinetic energy theorem，and momentum theorem to solve the same problem，cultivates and improves students' problemsolving ability，and cultivates their scientific thinking.
Keywords：image method;Kinetic energy theorem;Momentum theorem
1 原題
潛艇從海水高密度區(qū)域駛?cè)氲兔芏葏^(qū)域，浮力頓減，潛艇如同汽車那樣掉下懸崖，稱之為“掉深”，曾有一些潛艇因此沉沒(méi)。（剩余4037字）