Energy and Momentum of Rotating Systems

L_{initial} = L_{final}

(if

\Sigma\tau_{ext} = 0

)

Built for May 2027 AP Exam

$L_{initial} = L_{final}$ (if $\Sigma\tau_{ext} = 0$ )

Reviewed by ACEpath AP Math Editorial Team

Last Updated: September 2026

On the AP Exam

Concept Review

Topic-Specific Study Method

Training & Error Diagnosis

Past 10-Year AP Exam Appearance

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Start Topic Practice Next Topic: 6.7 Orbital Motion: Kepler's Second Law (equal area in equal time) is a consequence of angular momentum conservation.

Energy and Momentum of Rotating Systems

L_{initial} = L_{final}

(if

\Sigma\tau_{ext} = 0

)

Built for May 2027 AP Exam

$L_{initial} = L_{final}$ (if $\Sigma\tau_{ext} = 0$ )

Reviewed by ACEpath AP Math Editorial Team

Last Updated: September 2026

On the AP Exam

Concept Review

Topic-Specific Study Method

Training & Error Diagnosis

Past 10-Year AP Exam Appearance

Practice Examples

Cheatsheet

TOPIC REVIEW • NEXT STEP IN YOUR LEARNING LOOP

Ready to check your understanding?

Strengthen this topic with AP-style practice, or continue to next topic.

Start Topic Practice Next Topic: 6.7 Orbital Motion: Kepler's Second Law (equal area in equal time) is a consequence of angular momentum conservation.

Energy and Momentum of Rotating Systems

L_{initial} = L_{final}

(if

\Sigma\tau_{ext} = 0

)

Built for May 2027 AP Exam

$L_{initial} = L_{final}$ (if $\Sigma\tau_{ext} = 0$ )

Reviewed by ACEpath AP Math Editorial Team

Last Updated: September 2026

On the AP Exam

Concept Review

Topic-Specific Study Method

Training & Error Diagnosis

Past 10-Year AP Exam Appearance

Practice Examples

Cheatsheet

TOPIC REVIEW • NEXT STEP IN YOUR LEARNING LOOP

Ready to check your understanding?

Strengthen this topic with AP-style practice, or continue to next topic.

Start Topic Practice Next Topic: 6.7 Orbital Motion: Kepler's Second Law (equal area in equal time) is a consequence of angular momentum conservation.