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# Mu of the Shoe

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Friction lab powerpoint

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### Mu of the Shoe

1. 1. Good Afternoon!Today we will: do a three part labPlease Do BEFORE THE TARDY BELL: get your lab notebook get out something to write with get out your spiral
2. 2. Warm-UpIn your spiral, answer the following twoquestions in complete sentences byrestating the question: According to Newton’s 3rd Law, what are the two forces acting on a shoe that is resting on a table? According to Newton’s 1st & 2nd law, what must be present for an object to accelerate?
3. 3. Warm-Up, Part IIIn your spiral, write a hypothesisstatement for the following question: What is the effect of a lack of sleep on a child’s school performance?
4. 4. What Do You See?
5. 5. The Mu of the ShoeIn your lab notebook, open to the firstclean page and title it, “The Mu of theShoe – Frictional Forces.”Don’t forget to make an entry in yourTable of Contents as well – Chapter 2,sec 7
6. 6. The Mu of the Shoe Today, we are going to investigate thefactors involved in friction.The factors (variables) we will be lookingat today are: weight WRITE properties of the surfaces THIS DOWN surface area
7. 7. VariablesWe will be testing three variables.What are they? weight type of surface surface areaBecause we are testing three differentvariables, we will do three separateexperiments
8. 8. Form a hypothesis statementInvestigation #1 What is the effect of weight on the frictional force between two objects? 1. copy down this question in your lab notebook 2. write a hypothesis statement that can be tested in order to answer the question
9. 9. Procedure – In your Lab Group Thinking about the materials we will useand how you will test your hypothesis,write out a procedure and create a datatable. Plan to have at least five differentweights. Finish Investigation #1 in:You have seven minutes.
10. 10. Time to test the Effect of Weight!Get back in your lab groups and conductyour investigation on the effect of weighton frictional force.You have 10 minutes to complete.
11. 11. Form a hypothesis statementInvestigation #2 What is the effect of a rough surface on the frictional force between two objects? Copy down this question and write a hypothesis.In your group, create a new procedure anddata table for this investigation and run theexperiment. You have 8 minutes.
12. 12. Form a hypothesis statementInvestigation #3 What is the effect of surface area on the frictional force between two objects? Copy down this question and write a hypothesis.In your group, create a new procedure anddata table for this investigation and run theexperiment. You have 10 minutes.