# ALEX Classroom Resource

## Torque: Crash Course Physics #12

Classroom Resource Information

Title:

Torque: Crash Course Physics #12

URL:

https://aptv.pbslearningmedia.org/resource/torque-crashcourse-2012/torque-crash-course-physics/

Content Source:

PBS
Type: Audio/Video

Overview:

In this episode of Crash Course Physics, Dr. Shini discusses what torque is, how it works, why it works, and what it all has to do with this thing called "Moment of Inertia."

Content Standard(s):
 Science SC2015 (2015) Grade: 9-12 Physics 4 ) Identify and analyze forces responsible for changes in rotational motion and develop an understanding of the effect of rotational inertia on the motion of a rotating object (e.g., merry-go-round, spinning toy, spinning figure skater, stellar collapse [supernova], rapidly spinning pulsar). Unpacked Content Scientific And Engineering Practices:Analyzing and Interpreting DataCrosscutting Concepts: Systems and System ModelsDisciplinary Core Idea: Motion and Stability: Forces and InteractionsEvidence Of Student Attainment:Students: Identify forces responsible for changes in rotational motion. Analyze forces responsible for changes in rotational motion. Predict changes in motion of various rotating bodies based on changes in their rotational inertia.Teacher Vocabulary:angular position rotational inertia center of gravity model graph force rotational motion circular motion torque lever arm angle radian circumference diameter radius arc angular momentum angular velocity angular acceleration angle of rotation distance perpendicular system clockwise counterclockwise equilibrium translational equilibrium rotational equilibrium axis of rotation center of mass Newton's laws tangential moment of inertia free body diagramKnowledge:Students know: How to identify the system. Apply Newton's Second Law of Motion. What rotational inertia is and how it affects the motion of a rotating object.Skills:Students are able to: Draw rigid body diagrams. Solve for net force. Extrapolate their understanding of a physical illustration of a phenomenon (e.g., spinning figure skater, merry-go-round) to an intangible example of the same phenomenon (e.g., rapidly spinning pulsar, supernova). Follow written and verbal instructions.Understanding:Students understand that: Objects in rotational motion experience varied changes in motion depending upon their rotational inertia and the net force acting upon them.AMSTI Resources:ASIM Module: Introduction to Torque Rotational Motion Moment of Inertia Conservation of Angular Momentum This standard should be enhanced by a deep level of mathematical analysis and laboratory experience.
Tags: inertia, moment of inertia, physics, torque