📚 Year 8 OCR Physics: Essential Concepts Overview | Year 8 OCR 物理：核心知识点梳理
Get ready to explore the fascinating world of Year 8 physics! This guide covers all the essential OCR physics topics you will encounter in Year 8, from forces and energy to electricity, waves, and space. Use this resource to reinforce your classroom learning and prepare for assessments.
准备好探索 Year 8 物理的奇妙世界吧！本指南涵盖了 Year 8 OCR 物理的所有核心主题，包括力、能量、电学、波以及太空。使用这份资源巩固你的课堂学习并为评估做好准备。
1. Forces and Motion | 力与运动
A force is a push or pull that acts on an object. Forces can change the speed, direction, or shape of an object. Force is measured in newtons (N). When two forces act on an object in opposite directions, the resultant force is the difference between them. If the resultant force is zero, the forces are balanced and the object remains at rest or moves at constant speed. If the resultant force is not zero, the forces are unbalanced, causing acceleration or deceleration.
力是作用在物体上的推或拉。力可以改变物体的速度、方向或形状。力的单位是牛顿 (N)。当两个力沿相反方向作用在物体
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