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Rotational Motion: Crash Course Physics #11

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Rotational Motion: Crash Course Physics #11


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Type: Audio/Video


Did you know that at a certain point on a moving wheel there's no motion? It's all relative, right? Prepare to have your mind blown in this episode of Crash Course Physics where Dr. Shini delves into the world of rotational motion!

Content Standard(s):
SC2015 (2015)
Grade: 9-12
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 Data
Crosscutting Concepts: Systems and System Models
Disciplinary Core Idea: Motion and Stability: Forces and Interactions
Evidence Of Student Attainment:
  • 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 diagram
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.
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.
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: physics, rotational motion
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Author: Stephanie Carver