Friction: Crash Course Physics #6

Learning Resource Type

Classroom Resource

Subject Area

Science

Grade(s)

9, 10, 11, 12

Overview

This video answers questions like, "Why is it hard to move a heavy bookcase across a carpeted floor?" and "Why is it easier to keep it moving than it was to get it started moving?" You might think it's all about weight, but actually, it's about friction--two kinds of friction. Dr. Shini tells us about static and kinetic friction; how they work and how they're different.

Science (2015) Grade(s): 09-12 - Physics

SC15.PHYS.3

Evaluate qualitatively and quantitatively the relationship between the force acting on an object, the time of interaction, and the change in momentum using the impulse-momentum theorem.

UP:SC15.PHYS.3

Vocabulary

  • model
  • graph
  • position
  • velocity
  • acceleration
  • displacement
  • distance
  • speed
  • instant
  • interval
  • kinematic equations
  • analyze
  • slope
  • area under curve
  • intercepts
  • vector
  • scalar
  • coordinates
  • origin
  • magnitude
  • units of measure
  • significant figures
  • friction
  • free-body diagram
  • force diagram
  • net force
  • inertia
  • action-reaction
  • proportional
  • force
  • mass
  • system
  • momentum
  • impulse
  • peak
  • trough

Knowledge

Students know:
  • How to use mathematical computations to solve for unknown variables in the impulse momentum theorem.
  • How to interpret area under a curve of a graph.
  • How to solve for kinematics variables using mathematical computations.
  • Appropriate units of measure.
  • How to identify the system.

Skills

Students are able to:
  • Manipulate equations.
  • Interpret graphical data.
  • Follow written and verbal instructions.
  • Draw force diagrams.
  • Identify the forces acting on an object.
  • Solve mathematical equations.

Understanding

Students understand that:
  • The same change in momentum can be caused by different force—time combinations.

Scientific and Engineering Practices

Obtaining, Evaluating, and Communicating Information

Crosscutting Concepts

Cause and Effect

CR Resource Type

Audio/Video

Resource Provider

PBS

License Type

Custom

Accessibility

Video resources: includes closed captioning or subtitles
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