探析物体平衡稳定性的两种分析方法——以2016年博雅计划物理试题第3题为例

来源 :物理教学 | 被引量 : 0次 | 上传用户:m123987679
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
本文运用达成体系稳定平衡、不稳定平衡与随遇平衡的相关条件,从最小势能与回复力矩的角度对2016年博雅计划物理试题第3题的解法进行分析与优化,在丰富该题答题思路与途径的基础上结合相关实例进行适当的应用与说明,从而发掘试题的物理内涵与价值.
其他文献
为有效控制基坑开挖情况,及时发现沉降危害,保护施工人员安全,结合某地铁车站的工程实例,对地表沉降、支护桩顶位移、支护桩体位移、锚杆应力和地下管线沉降几种互相关联的基坑监测数据进行多元回归预测.结果表明,量纲化处理后的多元回归模型能有效预测基坑沉降,尤其在锚杆应力预测中的精度更好,平均相对误差受原始样本绝对值的影响较小.
We use the ferromagnetic resonance (FMR) method to study the properties of ferromagnetic thin film,in which ex-ternal stress anisotropy,fourfold anisotropy and uniaxial anisotropy are considered.The analytical expressions of FMR frequency,linewidth and th
The thermoelectric (TE) materials and corresponding TE devices can achieve direct heat-to-electricity conversion,thus have wide applications in heat energy harvesting (power generator),wearable electronics and local cooling.In recent years,aerogel-based T
Currently,wire bonding is the most popular first-level interconnection technology used between the die and package terminals,but even with its long-term and excessive usage,the mechanism of wire bonding has not been completely eval-uated.Therefore,fundame
We propose a scheme where one can exploit auxiliary resources to achieve quantum multicast communication with network coding over the butterfly network.In this paper,we propose the quantum 2-pair multicast communication scheme,and extend it to k-pair mult
The doping process and thermoelectric properties of donor-acceptor (D-A) type copolymers are investigated with the representative poly([2,6\'-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene]3-fluoro-2-[(2-ethylhexyl)-carbonyl]thieno[3,4-b]thiop
The excited-state intramolecular proton transfer of 2-(2\'-hydroxyphenyl)benzoxazole dye in different solvents is in-vestigated using ultrafast femtosecond transient absorption spectroscopy combined with quantum chemical calculations.Conformational conv
We observe characteristic atomic behaviors in the Bose-Einstein-condensation-Bardeen-Cooper-Schrieffer (BEC-BCS) crossover,by accurately tuning the magnetic field across the Feshbach resonance of lithium atoms.The magnetic field is calibrated by measuring
Light emission by inelastic tunneling (LEIT) from a metal-insulator-metal tunnel junction is an ultrafast emission process.It is a promising platform for ultrafast transduction from electrical signal to optical signal on integrated circuits.However,existi
2021年中考物理试题,基于“核心价值、学科素养、关键能力、必备知识”的考查要求,较好地考核了学生的信息获取、科学思维、科学探究、语言表述等能力,同时考查了认识问题、分析问题、解决问题、勇于创新的综合素养.试题围绕“依托知识渗透,聚焦思维的深刻性”“立足学科融合,强化思维的综合性”“着眼思维技巧,领悟思维的方法性”“推崇一题多案,彰显思维的灵活性”“探索一题多变,引领思维的联想性”“密切联系实际,注重思维的批判性”“践行科学探究,凸显思维的创新性”七个方面,呈现出逻辑性、新颖性、前沿性、开放性等特点,考查