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“Mu of the Shoe”

“Mu of the Shoe”. Friction: Day 3. Curriculum. Big Idea: All forces arise from the interactions between different objects.

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“Mu of the Shoe”

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  1. “Mu of the Shoe” Friction: Day 3

  2. Curriculum • Big Idea: All forces arise from the interactions between different objects. • Concept: When two surfaces of objects are in contact with each other, the force of friction between them depends on the nature of the materials in contact and the normal force. • Competency: Construct a free body diagram indicating the magnitude and direction of the forces on an object and use information from the diagram to determine the motion of the object. PA Standard 3.2.10.B1: Analyze the relationships among the net force acting on a body, the massof the body, and the resulting acceleration using Newton’s Second Law of Motion.

  3. Today’s Agenda (Academic) • Opener: What is “mu?” • Free Body Diagrams with Friction notes • Friction Problems – see handout • Turn in Mu of the Shoe packet • Closure: What is the only factor that affects the coefficient of friction? What are the two factors that affect the force of friction? Take Home Assignment: Complete the second friction scenario.

  4. Honors Goals • Design and conduct an experiment to compare the amount of friction between different surfaces. • Solve real world problems with friction using Newton’s Second Law: Fnet = m×a

  5. Today’s Agenda (Honors) • Opener – What is coefficient of friction? • Go over homework in small groups. • Conduct your experiment with friction for the Furniture Store. • Closure: What is the one factor that the coefficient of friction depends on? Take Home Assignment: Friction Group Lab Report due next Friday.

  6. Scenario A new furniture company in Haverford Township is asking for your help in determining the best of three materials to use on the bottom of their dining room chairs. The company wants the chairs to have the least possible amount of friction when slid across a dining room floor. The dining room floor surface is the same as your lab table surface.

  7. Materials for Each Group • 1 felt pasco slider • 1 cork pasco slider • 1 plastic pasco slider • 1 spring scales • a set of masses • clean lab tables • friction scenarios and free body diagram handouts

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