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Uniform Circular Motion: Crash Course Physics #7

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Uniform Circular Motion: Crash Course Physics #7


Content Source:

Type: Audio/Video


In this video, Dr. Shini discusses centripetal force, centrifugal force, and a few other bits of physics to help us understand uniform circular 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: centrifugal force, centripetal force, circular motion
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Author: Stephanie Carver