Year 11 Edexcel Engineering: Quick Reference Formula & Theorem Handbook | Edexcel 11 年级工程：公式定理速查手册

📚 Year 11 Edexcel Engineering: Quick Reference Formula & Theorem Handbook | Edexcel 11 年级工程：公式定理速查手册

This handbook compiles the essential formulas, theorems, and constants that every Year 11 Edexcel Engineering student must master. From mechanics and electricity to materials and energy, these equations form the backbone of your exam. Each formula is presented with a clear explanation and its SI units to help you apply it confidently in problem-solving.

这本手册汇集了每位 Edexcel 11 年级工程学生必须掌握的核心公式、定理和常数。从力学和电学到材料与能量，这些方程构成了考试的基础。每个公式都附有清晰的解释和国际单位制，帮助你自信地应用到解题中。

1. Motion and Kinematics | 运动学

v = u + at

This equation links final velocity (v), initial velocity (u), acceleration (a) and time (t) for uniformly accelerated motion. It is used when three of the variables are known to find the fourth.

该方程将匀加速运动中的末速度（v）、初速度（u）、加速度（a）和时间（t）联系起来。当已知其中三个量时，可求第四个量。

s = ut + ½at²

This calculates displacement (s) when initial velocity, acceleration and time are known. Displacement is a vector quantity measured in metres (m).

此公式用于已知初速度、加速度和时间时计算位移（s）。位移是矢量，单位为米（m）。

v² = u² + 2as

This links final velocity, initial velocity, acceleration and displacement, without involving time. Useful when time is not given.

该式联系末速度、初速度、加速度和位移，不涉及时间。当时间未给出时非常有用。

Average speed = total distance / total time. For uniformly accelerated motion, it also equals (u + v) / 2.

平均速度 = 总路程 / 总时间。对于匀加速运动，也可用 (u + v) / 2 计算。

2. Forces and Newton’s Laws | 力与牛顿定律

F = ma

Newton’s Second Law: the net force (F) on an object equals its mass (m) multiplied by its acceleration (a). Force is measured in newtons (N).

牛顿第二定律：作用在物体上的净力（F）等于物体质量（m）乘以其加速度（a）。力的单位为牛顿（N）。

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