The area under an acceleration-time graph gives
Correct answer: Velocity change
Why: Integrating acceleration over time gives change in velocity.
AP Physics C: Mechanics Practice Questions
Answer original AP-style diagnostic questions, review explanations, and identify the next unit to study.
AP Physics C: Mechanics diagnostic practice set
These are original practice questions, not copied College Board items. Use official released questions for final calibration.
Question 1 of 3
Review the reasoning after you finish
The interactive set keeps answers hidden while you work. This review section remains crawlable and gives every student a complete correction path after the attempt.
Angular momentum is conserved when external torque is
Correct answer: Zero
Why: Net external torque equals the time rate of change of angular momentum.
For a mass-spring oscillator, increasing mass causes period to
Correct answer: Increase
Why: T=2π√(m/k), so period grows with √m.
Practise each section under its own calculator rule
Practising with a calculator you will not be handed is the most common way a practice score stops predicting an exam score. Set each practice block up to match the section it rehearses.
| Section or part | What you may use | What that means for your work |
|---|---|---|
| Multiple choice | Four-function, scientific, or graphing calculator | Allowed throughout, though most items are symbolic or proportional. |
| Free response | Four-function, scientific, or graphing calculator | The hard parts are calculus, not arithmetic. Expect to integrate and differentiate by hand. |
| Provided for the whole exam | Equations and constants table | Both sections. Note that the table gives you relationships, not the calculus you must do with them. |
How practice should cover the complete course
Kinematics
Vector motion and calculus
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Force and Translational Dynamics
Newton's laws and differential models
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Work, Energy, and Power
Line integrals and energy
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Linear Momentum
Systems, impulse, collisions
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Torque and Rotational Dynamics
Rigid-body rotation
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Energy and Momentum of Rotating Systems
Angular conservation
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Oscillations
Differential equations and SHM
Required: practice one recognition question, one direct application, and one mixed prompt that requires you to choose this unit without being told.
Use the result to focus your AP Physics C: Mechanics review
Read the score as a map, not a verdict
Each answer shows a relationship between course knowledge and an exam decision. A miss may mean that a definition is unclear, a representation was misread, or the right method was not selected. Compare each miss with these AP Physics C: Mechanics priorities before choosing the next unit or practice set.
- Differential equations from Newton's laws
- Moment of inertia
- Energy and momentum system boundaries
- Graph slopes and areas
- Symbolic answers before numbers
Next steps after the AP Physics C: Mechanics diagnostic
Use a four-step correction cycle
- Write the rule or idea behind every miss.
- Solve a second problem of the same type without looking back.
- Mix that skill with two older units tomorrow.
- Complete official released questions under authentic timing.
Questions about AP Physics C: Mechanics exam practice
How many questions are on the AP Physics C: Mechanics exam?
The published format is 42 questions on multiple choice and 4 questions on free response. Multiple choice — About 2 minutes each. Many are one derivative or one integral away from the answer - spot which. Free response — About 24 minutes each. These are long derivation chains where later parts depend on earlier symbols.
Which AP Physics C: Mechanics units should I practise first?
This course publishes no percentage weightings, so practise by course priority: Differential equations from Newton's laws; Moment of inertia; Energy and momentum system boundaries. Then mix those with the units you have not touched in a fortnight.
Can I use a graphing calculator while I practise for AP Physics C: Mechanics?
Only where the exam allows one, and practising otherwise builds the wrong habit. Multiple choice: Allowed throughout, though most items are symbolic or proportional. Free response: The hard parts are calculus, not arithmetic. Expect to integrate and differentiate by hand. Provided for the whole exam: Both sections. Note that the table gives you relationships, not the calculus you must do with them.
What is the most common way students lose points on AP Physics C: Mechanics?
Applying constant-acceleration kinematics to a variable force such as drag or a spring. If the force depends on position or velocity, you need a differential equation.
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