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AP®PhysicsCollege BoardPhysics 1: Algebra-BasedStudy GuidesUnit 6: Energy & Momentum of Rotating SystemsAngular Momentum & Angular ImpulseAngular Impulse

Angular Impulse (College Board AP® Physics 1: Algebra-Based)

Study Guide

Katie M

Written by: Katie M

Reviewed by: Caroline Carroll

Angular impulse

  • The change in an object’s motion due to an external torque acting on it for a time is described by angular impulse

  • Angular impulse is defined as the product of the average torque exerted on an object or rigid system and the time interval during which it acts

angular space impulse space equals space tau increment t

  • Where:

    • angular impulse is measured in straight N times straight m times straight s

    • tau = average torque exerted, measured in straight N times straight m

    • increment t = time interval over which the torque acts, measured in straight s

  • Angular impulse has the same direction as the net torque exerted on the object or system

  • Therefore, when the average torque exerted over a time interval is zero open parentheses tau space equals space 0 close parentheses, no angular impulse is exerted on the system

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    Author
    Reviewer
    Katie M

    Author: Katie M

    Expertise: Physics

    Katie has always been passionate about the sciences, and completed a degree in Astrophysics at Sheffield University. She decided that she wanted to inspire other young people, so moved to Bristol to complete a PGCE in Secondary Science. She particularly loves creating fun and absorbing materials to help students achieve their exam potential.

    Caroline Carroll

    Author: Caroline Carroll

    Expertise: Physics Subject Lead

    Caroline graduated from the University of Nottingham with a degree in Chemistry and Molecular Physics. She spent several years working as an Industrial Chemist in the automotive industry before retraining to teach. Caroline has over 12 years of experience teaching GCSE and A-level chemistry and physics. She is passionate about creating high-quality resources to help students achieve their full potential.