Waves on Strings (Levels: Intro, APB)

This podcast explains standing waves on strings, including an explanation for how to calculate which frequencies of vibration will 'work' to cause a certain string to resonate at all of its different harmonic frequencies.

Static Equilibrium (Levels: Intro, APB, APC)

This podcast introduces the idea of static equilibrium, once students are already familiar with torque concepts.

Intro to Sound Waves (Levels: Intro, APB)

This podcast describes several sound wave properties, and introduces the sound wave phenomena of Doppler Effect and Beat Frequency. Simple calculations are also briefly discussed.

Forces During Rolling (Level: APC)

This podcast explains how to examine forces and torques while an object is rolling.

Torque & Newton's 2nd Law for Rotation (Level: APC)

This podcast explains what torque is, and how to calculate it.  Newton's 2nd Law is also revisited, from a rotational perspective.