Torque & Rotational Dynamics

AP Physics 1 • Unit 710-15%

Extending Newton's laws to rotating objects. Learn how torque causes angular acceleration, and how rotational inertia determines an object's resistance to rotation.

Core Concepts

Angular position and displacement – describing rotation in radians
Angular velocity – ω and tangential velocity, motion graphs
Torque – rotational analog of force with torque-time graphs
Rotational inertia – resistance to rotation, parallel axis theorem
Newton's Second Law for rotation – τ = Iα
Rotational equilibrium – Στ = 0 and static equilibrium
Rolling motion – combining rotation and translation

Key Equations

$\tau = rF\sin\theta$

$\Sigma\tau = I\alpha$

$I = \Sigma mr^2$

$v = r\omega$

$a_t = r\alpha$

$\omega = \omega_0 + \alpha t$

Real-World Applications

→Drawbridges and beam statics
→Hanging signs – tension and torque
→Massive pulleys and inclined systems
→Spool motion – which way does it roll?

Topic Map

🎯Where This Unit Leads

Master this material to build a strong foundation for these career paths.

Mechanical Engineering

Dynamics, vibrations, and machine design

See course map →

Aerospace Engineering

Flight dynamics and stability analysis

See course map →

Chemistry

Rigid rotor models for molecular rotations

See course map →

Physics

Rotational mechanics in Classical Mechanics

See course map →

Explore Other Units

← Course Overview ← Previous Next →

Master Torque & Rotational Dynamics

Try for free today. No payment due today. Cancel anytime.

See all pricing options