AP®︎ Physics C: Mechanics Unit 5: Notes & Study Guide

Prepare for your quiz, test, or the AP exam with a comprehensive review on Unit 5 of AP Physics C: Mechanics – Torque and Rotational Dynamics.

Exam weight: 10%–15%
6 Topics

Unit 5: Torque and Rotational Dynamics

How torque, rotational inertia, and Newton’s laws extend to spinning and rotating systems.

Begin with Topic 5.1: Rotational Kinematics

To review Unit 5, go through each of the 6 topics below.

Everything you actually need to know for your Unit 5 test, pulled directly from the AP® Physics C: Mechanics curriculum.

Topic 5.1
~7 min
Review
Rotational Kinematics
Rotational Kinematics
  • Angular Displacement, Angular Velocity, and Angular Acceleration
  • Rotational and Linear Motion Are Mathematically Identical
  • Constant Angular Acceleration Equations
Review
Topic 5.2
~7 min
Review
Connecting Linear and Rotational Motion
Connecting Linear and Rotational Motion
  • How Angular and Linear Quantities Are Connected
  • The Full Set of Linear Quantities for a Rotating Point
  • What Makes a Rigid Body Special
Review
Topic 5.3
~6 min
Review
Torque
Torque
  • What Torque Is
  • Components of the Torque Formula
  • Direction of Torque and the Cross Product
Review
Topic 5.4
~6 min
Review
Rotational Inertia
Rotational Inertia
  • What Rotational Inertia Is
  • Standard Rotational Inertia Results You Should Know
  • Rotational Inertia and the Center of Mass
Review
Topic 5.5
~6 min
Review
Rotational Equilibrium and Newton’s First Law in Rotational Form
Rotational Equilibrium and Newton’s First Law in Rotational Form
  • Rotational Equilibrium and Constant Angular Velocity
  • Translational vs Rotational Equilibrium
  • Torque and How to Calculate It
Review
Topic 5.6
~7 min
Review
Newton’s Second Law in Rotational Form
Newton’s Second Law in Rotational Form
  • Newton’s Second Law for Rotation
  • Rotational Inertia \( I \)
  • Applying \( \sum \tau = I\alpha \)
Review

Notes

1 credit used · 5/5 remaining