A solid uniform disk of mass M and radius R rotates about an axis through its center. Its moment of inertia is:
MCQ + FRQ
AP Physics C
Calculus-based mechanics + E&M. Two separate exams in one place.
6practice MCQs
1FRQ prompts
1–5scaled scoring
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What's in Phys C
Every unit is mapped to the official Course and Exam Description.
U1Mechanics: Kinematics
U2Newton's Laws
U3Energy
U4Momentum
U5Rotation
U6Oscillations
U7Gravitation
U8Electrostatics
U9Conductors & Capacitors
U10Circuits
U11Magnetic Fields
U12Electromagnetism
Try a few sample questions
Real Phys C format. Filter by difficulty or skill, then tap an answer to reveal the explanation.
Difficulty
Skill
A solid sphere of mass M and radius R rolls without slipping down an inclined plane of height h. What is its speed at the bottom?
A spherical conductor of radius R carries a net charge Q. Using Gauss's Law, the electric field inside the conductor (r < R) is:
A capacitor C in series with a resistor R is connected to a battery. The time constant τ of the circuit represents:
Sample FRQ · AI graded
FRQ prompt
Physics C Mechanics Free Response: A uniform rod of mass M and length L is pivoted at one end and held horizontally. It is released from rest. (a) Using the rotational form of Newton's second law (τ_net = Iα), find the angular acceleration of the rod immediately after release. (b) Find the linear acceleration of the center of mass immediately after release. (c) Find the angular velocity of the rod when it has swung to the vertical position (hanging straight down). Use energy…Practice full FRQs
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