KS3 CCEA Engineering: Quick Reference Formula & Theorem Handbook | KS3 CCEA 工程：公式定理速查手册

📚 KS3 CCEA Engineering: Quick Reference Formula & Theorem Handbook | KS3 CCEA 工程：公式定理速查手册

Welcome to your KS3 CCEA Engineering quick reference handbook. This guide collects the essential formulas and theorems you will encounter, from forces and motion to electrical circuits and mechanisms. Use it for revision, homework, and practical projects.

欢迎使用 KS3 CCEA 工程速查手册。本指南汇集了您将遇到的关键公式和定理，涵盖力与运动、电路及机械结构。可用于复习、作业和实际项目。

1. Force and Newton’s Second Law | 力与牛顿第二定律

F = m × a

Newton’s Second Law links the resultant force (F) acting on an object to its mass (m) and the acceleration (a) it experiences. Force is measured in newtons (N), mass in kilograms (kg), and acceleration in metres per second squared (m/s²).

牛顿第二定律将作用在物体上的合力 (F) 与其质量 (m) 和加速度 (a) 联系起来。力以牛顿 (N) 为单位，质量以千克 (kg) 为单位，加速度以米每二次方秒 (m/s²) 为单位。

When calculating acceleration, always use the resultant force – the overall force after considering all pushes and pulls.

计算加速度时，务必使用合力——即考虑所有推力和拉力后的总力。

2. Density | 密度