There's no need to have friction among instructors regarding the resource. Pupils investigate how marbles and coins slide along different surfaces which gives them information to estimate coefficients of friction.

Concepts

friction, static friction, dynamics, coefficient of friction, technology resources

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Instructional Ideas

• Have older learners calculate coefficients of friction for different surfaces
  

Classroom Considerations

• Some prior preparation is necessary (freezing water in a cookie sheet)
• Activity requires a variety of materials and surfaces

Pros

• Lists questions to use in discussion
• Very detailed instructions
  

Cons

• None