3.4 力的合成和分解-力的合成 课件-2022-2023学年高一上学期物理人教版(2019)必修第一册
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§3.4 力的合成
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学习目标
(1)掌握合力与分力的概念以及等效替代的思想和共点力概念
(3)能够通过自主实验探究归纳出互成角度的两个共点 力的合成遵循平行四边形定则。
(2)培养提出问题,猜想假设,设计方案、自主探究和交流总结的一般科学探究的能力。
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1、什么是分力、合力?他们是什么关系?
2、什么是力的合成?
3、同一直线上的力怎么合成?
4、互成角度的力怎么合成?
5、什么是平行四边形定则?
6、验证平行四边形定则的实验步骤、原理、误差来源、注意事项是什么?
7、如何求得合力的大小?
8、互成角度的多个力 怎么合成?
9、什么是矢量、标量?
10、合力的大小与两个分力的夹角的关系?
11、两个力的合力的变化范围是多