AP Physics 1 MCQ Practice by Topic 2027
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There are 42 original multiple-choice questions for each of the 43 official AP Physics 1 topics, giving 1,806 topic MCQs with answers, explanations and lesson routing.
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- 1,806 topic MCQs total.
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All 43 official topics are available. Each MCQ bank contains 42 original questions and each FRQ bank contains four prompts aligned to the four current free-response task types.
Torque and Work Practice
All questions are original. Check each answer for immediate feedback and explanation, then use the lesson link inside the explanation when a concept needs repair.
A constant torque of 5 N·m turns a shaft through 4 rad in the same rotational sense. How much work is done?
Correct answer: C. For constant aligned torque, W=τΔθ=(5)(4)=20 J.
A motor does +30 J of rotational work on a flywheel. If no other energy transfer matters, how does K_rot change?
Correct answer: B. Net rotational work changes rotational kinetic energy: W_net=ΔK_rot.
A resisting torque acts opposite an object’s angular displacement. What sign is the work done by that torque?
Correct answer: B. Opposing torque and angular displacement give negative work, reducing rotational kinetic energy if other transfers are absent.
Motor torque speeds a wheel up. Which Topic 6.2 concept most directly explains this physical situation?
Correct answer: C. Positive/negative rotational work: Torque aligned with angular displacement does positive work; opposing torque does negative work.
Which statement best defines Positive/negative rotational work in Topic 6.2?
Correct answer: A. Correct definition: Torque aligned with angular displacement does positive work; opposing torque does negative work.
A second situation is observed: Bearing friction torque slows a spinning wheel. Which concept is being applied?
Correct answer: B. Positive/negative rotational work is the matching concept because Torque aligned with angular displacement does positive work; opposing torque does negative work.
Constant 4 N·m through 3 rad gives 12 J. Which Topic 6.2 concept most directly explains this physical situation?
Correct answer: C. Torque–angle graph: Area under τ versus θ gives rotational work.
Which statement best defines Torque–angle graph in Topic 6.2?
Correct answer: A. Correct definition: Area under τ versus θ gives rotational work.
A second situation is observed: A linearly changing torque gives triangular/trapezoidal area. Which concept is being applied?
Correct answer: B. Torque–angle graph is the matching concept because Area under τ versus θ gives rotational work.
A flywheel speeds up after positive net torque work. Which Topic 6.2 concept most directly explains this physical situation?
Correct answer: C. Work–energy theorem for rotation: Net rotational work equals change in rotational kinetic energy.
Which statement best defines Work–energy theorem for rotation in Topic 6.2?
Correct answer: A. Correct definition: Net rotational work equals change in rotational kinetic energy.
A second situation is observed: Braking torque removes K_rot. Which concept is being applied?
Correct answer: B. Work–energy theorem for rotation is the matching concept because Net rotational work equals change in rotational kinetic energy.
A motor delivering torque at high ω transfers energy rapidly. Which Topic 6.2 concept most directly explains this physical situation?
Correct answer: C. Power in rotation: Rotational power can be related to torque and angular speed.
Which statement best defines Power in rotation in Topic 6.2?
Correct answer: A. Correct definition: Rotational power can be related to torque and angular speed.
A second situation is observed: A brake removes energy at a rate related to τ and ω. Which concept is being applied?
Correct answer: B. Power in rotation is the matching concept because Rotational power can be related to torque and angular speed.
Which relationship best represents this Topic 6.2 idea: Constant torque aligned with angular displacement?
Correct answer: B. Use W = τΔθ. Constant torque aligned with angular displacement.
In Topic 6.2, which variable-and-unit description belongs with W = τΔθ?
Correct answer: C. For W = τΔθ: W: J; τ: N·m; θ: rad
For Topic 6.2, consider this real application: 5 N·m through 4 rad gives 20 J. Which relationship supports that result?
Correct answer: A. The relevant relationship is W = τΔθ.
Which relationship best represents this Topic 6.2 idea: Rotational work-energy theorem?
Correct answer: B. Use W_net = ΔK_rot. Rotational work-energy theorem.
In Topic 6.2, which variable-and-unit description belongs with W_net = ΔK_rot?
Correct answer: C. For W_net = ΔK_rot: J
For Topic 6.2, consider this real application: +30 J net work raises K_rot by 30 J. Which relationship supports that result?
Correct answer: A. The relevant relationship is W_net = ΔK_rot.
Which relationship best represents this Topic 6.2 idea: Instantaneous rotational power for aligned torque/angular velocity?
Correct answer: B. Use P = τω. Instantaneous rotational power for aligned torque/angular velocity.
In Topic 6.2, which variable-and-unit description belongs with P = τω?
Correct answer: C. For P = τω: P: W; τ: N·m; ω: rad/s
For Topic 6.2, consider this real application: 10 N·m at 20 rad/s gives 200 W. Which relationship supports that result?
Correct answer: A. The relevant relationship is P = τω.
In Topic 6.2, analyze this situation: Motor turns a disk through 10 rad. Which conclusion is most consistent with the physics?
Correct answer: C. Positive torque work increases rotational kinetic energy.
Which Topic 6.2 worked example best illustrates this reasoning: “Positive torque work increases rotational kinetic energy”?
Correct answer: B. Electric motor: Motor turns a disk through 10 rad.
A student is deciding how to begin the “Electric motor” situation. What is the best first move?
Correct answer: B. Start with the physical model. Positive torque work increases rotational kinetic energy.
In Topic 6.2, analyze this situation: Friction torque opposes rotation. Which conclusion is most consistent with the physics?
Correct answer: C. Negative work lowers rotational kinetic energy.
Which Topic 6.2 worked example best illustrates this reasoning: “Negative work lowers rotational kinetic energy”?
Correct answer: B. Brake disk: Friction torque opposes rotation.
A student is deciding how to begin the “Brake disk” situation. What is the best first move?
Correct answer: B. Start with the physical model. Negative work lowers rotational kinetic energy.
In Topic 6.2, analyze this situation: Measured torque rises linearly with angle. Which conclusion is most consistent with the physics?
Correct answer: C. Geometric area under τ–θ is the work transferred.
Which Topic 6.2 worked example best illustrates this reasoning: “Geometric area under τ–θ is the work transferred”?
Correct answer: B. Torque-angle graph: Measured torque rises linearly with angle.
A student is deciding how to begin the “Torque-angle graph” situation. What is the best first move?
Correct answer: B. Start with the physical model. Geometric area under τ–θ is the work transferred.
In Topic 6.2, a student claims: “N·m for torque is automatically the same concept as joule.” Which correction is best?
Correct answer: B. Dimensions match, but torque and energy are distinct quantities.
Which statement should replace this misconception in a Topic 6.2 solution: “N·m for torque is automatically the same concept as joule.”?
Correct answer: A. Dimensions match, but torque and energy are distinct quantities.
In Topic 6.2, a student claims: “Work depends on angular speed only.” Which correction is best?
Correct answer: B. Work depends on torque through angular displacement; power involves rate.
Which statement should replace this misconception in a Topic 6.2 solution: “Work depends on angular speed only.”?
Correct answer: A. Work depends on torque through angular displacement; power involves rate.
In Topic 6.2, a student claims: “Area under τ–t gives work.” Which correction is best?
Correct answer: B. τ–θ area gives work; τ–t relates angular impulse.
Which statement should replace this misconception in a Topic 6.2 solution: “Area under τ–t gives work.”?
Correct answer: A. τ–θ area gives work; τ–t relates angular impulse.
What should a student identify before calculating in Topic 6.2?
Correct answer: B. Connect torque to angular displacement, use torque–angle graphs, and apply the rotational work–energy theorem.
Which statement best describes the AP Physics 1 scope for Topic 6.2?
Correct answer: B. Radians are required in the direct W=τΔθ relationship.
Which study sequence best matches this Topic 6.2 lesson?
Correct answer: B. The lesson is intentionally definition-first and explains terminology on the same page before equations and practice.