SC15.PHYS.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).
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
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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
Knowledge
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.
Scientific and Engineering Practices
Analyzing and Interpreting Data
Crosscutting Concepts
Systems and System Models
