How to Get a 5 in AP Physics 1: Algebra-Based

What we have for Physics 1

Everything below is free to work through and is organised against the same units as the official course framework, so you can go straight to the unit you are weakest in.

How the country actually scores

Approximate national results on AP Physics 1: Algebra-Based from recent score reports. Use these as context, not as a prediction — the exact curve is set fresh each year.

• 3 or higher46%
• 4 or higher24%
• Scored a 59%
• Scored 1 or 254%

Read that honestly: a 5 on Physics 1 is a minority outcome, earned by roughly one student in 11. It is not out of reach — but it is not the default outcome of finishing the class either, which is why the review phase below matters more than the coursework.

What a 5 in Physics 1 takes

The specific habits that separate a 5 from a 3 on this exam, drawn from the scoring patterns for Physics 1.

• Always draw a labeled free-body diagram before equations — it's often worth points and prevents sign errors.
• For the paragraph response, write complete sentences with physics vocabulary and cite the principle (e.g., "by conservation of momentum") — bullet fragments lose credit.
• Start from a fundamental principle and derive symbolically before plugging in numbers; the exam rewards the correct relationship even if arithmetic fails.
• When justifying, connect to a conservation law or Newton's laws explicitly and address the specific scenario — explain WHY, don't restate the answer.
• Draw the free-body diagram before writing any equation and label each force by its physical agent (Earth, surface, string). Invented forces such as “centrifugal force” or “force of motion” lose points immediately on the AP scoring guidelines.
• On “justify your answer” and paragraph-length response parts, name a specific principle (Newton’s third law, conservation of angular momentum, the work–energy theorem) and tie it to the given numbers or graph. Restating the answer in different words earns nothing.
• Solve symbolically first, then substitute. A symbolic result such as h = Us/(mg) instantly answers the “what if the mass doubles?” follow-up and earns partial credit even if the arithmetic later slips.
• For experimental design questions, name the equipment, state what you measure and how many trials, and say how you would linearize the data (plot T² against m, not T against m). Then explain what the slope means physically.
• Expect proportional reasoning on the multiple-choice section: fields obey inverse squares (double r → quarter g), kinetic and spring energies go as the square (double v → quadruple K), and pipe speeds scale with area rather than radius.

The 8 units of AP Physics 1: Algebra-Based

Unit names and exam weights follow the published course framework. Weights are the share of the multiple-choice section each unit is worth, so they tell you exactly where to spend time: Unit 2 (Force and Translational Dynamics), Unit 3 (Work, Energy, and Power), Unit 1 (Kinematics) are worth roughly 46–61% between them.

A unit-by-unit study order

Work the units in framework order for your first pass — later units in Physics 1 lean on earlier ones — then let your error log, not the unit numbers, drive the review phase. Each row below opens the first lesson of that unit.

1. 1Kinematics10–15% of the exam · 4 lessons · starts with “Position, Displacement & Velocity”
2. 2Force and Translational Dynamics18–23% of the exam · 4 lessons · starts with “Newton’s First & Second Laws”
3. 3Work, Energy, and Power18–23% of the exam · 4 lessons · starts with “Work & the Work–Energy Theorem”
4. 4Linear Momentum10–15% of the exam · 4 lessons · starts with “Momentum & Impulse”
5. 5Torque and Rotational Dynamics10–15% of the exam · 4 lessons · starts with “Rotational Kinematics”
6. 6Energy and Momentum of Rotating Systems5–8% of the exam · 4 lessons · starts with “Rotational Kinetic Energy”
7. 7Oscillations5–8% of the exam · 4 lessons · starts with “Simple Harmonic Motion & Springs”
8. 8Fluids10–15% of the exam · 4 lessons · starts with “Density & Pressure”

Formulas and relationships to know

Pulled from the Physics 1 lessons. The same list is on the printable Physics 1 cheatsheet.

On exam day

The exam-specific warnings our Physics 1 lessons flag as you go.

• On the AP exam, always state your positive direction before plugging in numbers. Half of kinematics is bookkeeping — a consistent sign convention earns points that raw algebra cannot.
• When a problem gives you velocities and a distance but never mentions time, reach straight for v² = v₀² + 2aΔx. Recognising that missing variable saves you from solving a needless quadratic.
• Free-response graph questions love the chain "slope of x–t → v, slope of v–t → a, area under v–t → Δx". Memorise those three links and you can convert between any pair of graphs.
• The classic AP trap: applying gravity to the horizontal axis. Horizontal velocity is constant for every projectile. Gravity changes only the vertical velocity. Keep the two axes in separate columns on your paper.
• On the AP exam, "equilibrium" does not mean "at rest." An object moving at constant velocity has zero acceleration, so its net force is also zero. Constant velocity and rest are the *same* dynamical situation.
• Draw the free-body diagram before writing a single equation. On free response, a correct FBD with properly labeled forces earns points even if your algebra later slips — and it prevents you from inventing forces that are not there.
• Watch the difference between "is it moving yet?" and "how fast does it slow down?" Use **static** friction (an inequality, up to μ_s N) to test whether motion starts; use **kinetic** friction (a fixed μ_k N) once it is already sliding.
• When a circular-motion problem asks for a force, first ask "which real force points toward the center?" Then set that force equal to mv²/r. Naming the actual force (tension, friction, gravity, normal) is what earns the reasoning point.
• Before computing work, check the angle between the force and the displacement. Perpendicular forces (normal force on a flat surface, gravity in horizontal motion, tension in circular motion) do exactly zero work — a favorite AP trap.
• You may place the h = 0 reference wherever it is most convenient — the floor, the tabletop, the ground below a cliff. Only the *change* in height between start and finish affects the physics, so choose the level that makes the arithmetic simplest.

Everything for Physics 1, in order of use

Interactive labs for Physics 1

Frequently asked questions