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AP Physics C: Mechanics MCQs

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AP Physics C: Mechanics practice questions by unit

Fiveable has 11,876 AP Physics C: Mechanics multiple-choice practice questions across 7 units, plus 226 stimulus-based question sets built around a source. Practice one unit or topic at a time.

  • Unit 1 – Kinematics: 1,627 multiple-choice questions, 29 stimulus sets
  • Unit 2 – Force and Translational Dynamics: 3,311 multiple-choice questions, 55 stimulus sets
  • Unit 3 – Work, Energy, and Power: 1,394 multiple-choice questions, 30 stimulus sets
  • Unit 4 – Linear Momentum: 989 multiple-choice questions, 21 stimulus sets
  • Unit 5 – Torque and Rotational Dynamics: 1,495 multiple-choice questions, 34 stimulus sets
  • Unit 6 – Energy and Momentum of Rotating Systems: 1,955 multiple-choice questions, 32 stimulus sets
  • Unit 7 – Oscillations: 1,105 multiple-choice questions, 25 stimulus sets

Sample AP Physics C: Mechanics practice question

Two satellites orbit a planet in circular paths. Satellite A has an orbital radius R, and Satellite B has an orbital radius 4R. Which claim correctly compares the orbital period T_B of Satellite B to the period T_A of Satellite A?

T_B = 8 T_A, because the square of the period is proportional to the cube of the radius

Correct answer

T_B = 4 T_A, because the period is directly proportional to the orbital radius value

T_B = 2 T_A, because the period is proportional to the square root of the radius value

T_B = 64 T_A, because the period is proportional to the cube of the orbital radius

Explanation

Applying Kepler's third law (T² ∝ r³) requires cubing the radius factor (4³ = 64) and taking the square root to find the period factor (√64 = 8).

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