Physics 1 · Unit 1 Progress Check

AP Physics 1 Unit 1 Progress Check Kinematics walkthrough.

AP Physics 1 Unit 1 is kinematics, and the Unit 1 Progress Check MCQ is mostly about reading graphs correctly rather than memorising equations. This walkthrough covers what the questions test, the traps that catch students early, and how to work through them. Explanations only — no AP Classroom answer keys.

Updated August 2026Written by Mahmudul HasanFree · No signup

What Unit 1 covers

Unit 1 is Kinematics. Kinematics is roughly 10–15% of the AP Physics 1 exam and underpins every later unit.

Position, velocity, acceleration

How the three relate, and why velocity and acceleration can point in opposite directions.

Motion graphs

Slope of position-time is velocity; slope of velocity-time is acceleration; area under velocity-time is displacement.

Kinematic equations

The constant-acceleration equations and when they legitimately apply.

Free fall

Motion under gravity alone, including objects thrown upward.

Projectile motion

Independent horizontal and vertical components sharing one time.

Vectors vs scalars

Displacement versus distance, velocity versus speed.

The Progress Check MCQ: what each question type tests

These are the question patterns that recur on this Progress Check, and what each one is really asking.

Graph interpretation

The most common Unit 1 question type. Identify what the slope and the area represent before reading options.

Sign reasoning

Negative velocity means moving in the negative direction; negative acceleration does not always mean slowing down.

Free-fall reasoning

At the top of a thrown object’s path velocity is zero but acceleration is still g downward.

Projectile questions

Horizontal velocity is constant; vertical accelerates. Time is the shared variable.

Matching graph shapes

Given a position graph, choose the matching velocity graph. Think slope, not shape.

The Progress Check FRQ

Unit 1 free response usually gives a motion scenario or a graph and asks you to describe, calculate, and justify. Points come from stating which kinematic relationship applies and why, keeping signs and directions consistent, and explaining reasoning in words alongside the algebra.

Where students lose the most points

Assuming negative acceleration means slowing

An object speeds up when velocity and acceleration share a sign, regardless of what that sign is.

Thinking acceleration is zero at the top of a throw

Velocity is zero there; acceleration is still 9.8 m/s² downward.

Confusing distance and displacement

Displacement is a vector and can be smaller than distance travelled, or zero.

Using kinematic equations when acceleration is not constant

They only apply for constant acceleration — check the graph first.

Mixing projectile components

Horizontal and vertical motions are independent; only time is shared.

How to work through this unit

On any motion graph question, write “slope = ” and “area = ” in the margin before looking at the answer options. Most Unit 1 questions are testing exactly one of those two things.

Once you have finished the Progress Check, put your raw score into our AP Physics 1 Calculator to see roughly where that pace puts you on the 1–5 scale, and use the AP Physics 1 Review for the full exam format and study plan.

Frequently asked questions

Quick answers — written by humans, not a chatbot.

What does the AP Physics 1 Unit 1 Progress Check cover?

Kinematics: position, velocity and acceleration, motion graphs, the constant-acceleration equations, free fall, projectile motion, and vectors versus scalars.

Does negative acceleration always mean slowing down?

No. An object speeds up whenever velocity and acceleration have the same sign, so negative acceleration with negative velocity means speeding up.

What does the area under a velocity-time graph represent?

Displacement. The slope of that same graph represents acceleration.

Do you publish AP Physics Unit 1 answer keys?

No. AP Classroom work is graded as your own, so we publish walkthroughs of the reasoning instead.