SAT Subject Test Physics: Analysis of 75 Typical Question Topic Distribution | SAT2 物理：75道典型题考点分布解析

📚 SAT Subject Test Physics: Analysis of 75 Typical Question Topic Distribution | SAT2 物理：75道典型题考点分布解析

The SAT Subject Test in Physics challenges students with 75 multiple-choice questions drawn from mechanics, electricity, waves, thermodynamics, and modern physics. Understanding how these questions are distributed across topics is the key to focused, efficient revision. This article dissects a representative set of 75 typical questions, mapping out the exact topic weightings, core subtopics, and the key formulas that repeatedly appear. We also highlight common question types and strategic pitfalls.

SAT2 物理考试通过 75 道选择题考查学生对于力、电、波、热学和现代物理的掌握。弄清这些题目的考点分布是高效复习的关键。本文以 75 道具有代表性的典型题为样本，梳理出每个板块的权重、核心子话题和反复出现的公式，同时揭示常见题型与策略性陷阱。

1. Overview of the SAT Physics Test and Our Sample | SAT物理考试与样本概述

The SAT Subject Test in Physics is a 60-minute paper with 75 questions, and no calculators are allowed beyond basic four-function models. Our sample of 75 questions is compiled from official College Board practice tests and released exams, accurately reflecting the real exam’s emphasis. The distribution is as follows:

SAT2 物理考试时长 60 分钟，共 75 题，只允许使用简单的四则运算计算器。我们的75道样题选自 College Board 官方练习题和公开真题，如实反映了真实考试的重点。其分布如下：

Every topic group is further broken down in the sections that follow, with precise subtopic counts and the equations you must know.

每个知识板块在接下来的各节中都会进一步细分，给出准确的子话题题数和必须掌握的公式。

2. Mechanics: The Dominant Force (27 Questions) | 力学：绝对主力 (27题)

Mechanics dominates the exam, covering one-dimensional motion, Newton’s laws, work and energy, momentum, circular motion, gravitation, and simple harmonic motion. Within these 27 questions, kinematics and dynamics alone account for roughly 10–12 items. Mastering free-body diagrams and the conservation laws is non-negotiable.

力学在考试中占比最大，涵盖一维运动、牛顿定律、功和能、动量、圆周运动、万有引力和简谐运动。这27道题中，仅运动学和动力学就占了约10–12题。熟练掌握受力分析和守恒定律是硬性要求。

Kinematics
Typical questions involve projectile motion or free fall. The four constant-acceleration equations are essential:
Kinematics
典型题目涉及抛体运动或自由落体。四个匀加速运动方程至关重要：

v = v₀ + at, Δx = v₀t + ½at², v² = v₀² + 2aΔx, Δx = ½(v + v₀)t

A classic pitfall is mismanaging the sign of g when the object is thrown upward; always define a consistent coordinate system.

一个经典陷阱是物体上抛时弄错 g 的符号；务必始终明确定义坐标系。

Dynamics
Newton’s Second Law, F_net = ma, appears in incline problems, Atwood machines, and systems with friction. The friction force is usually f = μN, where N is the normal force. Circular-motion dynamics brings centripetal acceleration a_c = v²/r.

动力学
牛顿第二定律 F_net = ma 在斜面、阿特伍德机和有摩擦的系统里反复考查。摩擦力通常为 f = μN，其中 N 是法向力。圆周运动的动力学则引入向心加速度 a_c = v²/r。

Work, Energy & Momentum
The work–energy theorem (W_net = ΔKE) and conservation of mechanical energy (especially with springs, PE_s = ½kx²) are tested in 4–5 questions. Momentum conservation (m₁v₁ + m₂v₂ = constant) and impulse (J = FΔt = Δp) typically appear together in collision problems.

功、能与动量
功能定理（W_net = ΔKE）和机械能守恒（特别是弹簧 PE_s = ½kx²）常占4–5题。动量守恒（m₁v₁ + m₂v₂ = 常数）和冲量（J = FΔt = Δp）通常一起出现在碰撞问题中。

Gravitation & SHM
Newton’s Law of Gravitation F_g = Gm₁m₂/r² and Kepler’s third law for circular orbits are common. For simple harmonic motion, the period formulas T = 2π√(m/k) (mass-spring) and T = 2π√(L/g) (pendulum) are indispensable.

万有引力与简谐运动
万有引力定律 F_g = Gm₁m₂/r² 和圆轨道的开普勒第三定律是常见考点。简谐运动中，周期公式 T = 2π√(m/k)（弹簧振子）和 T = 2π√(L/g)（单摆）必须牢记。

3. Electricity and Magnetism: Core Principles (18 Questions) | 电磁学：核心原理 (18题)

Electricity and magnetism supply roughly one quarter of the test. Questions are split among electrostatics, DC circuits, magnetic forces, and electromagnetic induction. The most heavily weighted subtopics are electric fields/potential and simple circuit analysis.

电磁学约占试卷的四分之一，涵盖静电学、直流电路、磁力和电磁感应。其中权重最大的是电场/电势和简单电路分析。

Electrostatics
Coulomb’s law F = kq₁q₂/r² and electric field E = F/q are fundamental. Concepts of electric potential V = kq/r and equipotential lines appear in both conceptual and quantitative items. A typical question asks for the work done moving a charge between two potentials: W = qΔV.

静电学
库仑定律 F = kq₁q₂/r² 和电场 E = F/q 是基础。电势 V = kq/r 以及等势线概念在定性和定量题中都会出现。典型题目会要求计算电荷在两点间移动做的功：W = qΔV。

DC Circuits
Ohm’s law (V = IR) and the rules for series and parallel resistors (R_eq = R₁ + R₂ + … ; 1/R_eq = 1/R₁ + 1/R_{Published by TutorHao | Physics Revision Series | aleveler.com}

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