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November 4 physics physics Gateway High School Olycasts Gateway High School Olycasts

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Table of Contents #. Date Title-Page – Page Number 20. October 5/6 Newtons Laws - 53 21.October 7/8 Newtons Law Problems – 55 22. October 11/12 Newtons Second Law Lab - 58 23. October 14/15 Newtons Second Law Lab II - 61 24. October 18/19 Newtons Law Quiz - 63 25.October 20/21 Friction – 65 26.October 22/November 1 Friction II - 68 27.November 2/3 Mu of the Shoe Lab- 73 28.November 5 Friction Quiz- 75 1

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In: A 3 kg book slides across a table and decelerates to a stop. The acceleration is -5 m/s 2. What is the force of friction on the table? What is the force of friction on the table? What is the µ of the table/book combination? What is the µ of the table/book combination?

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Objective: To Show our understanding of the force of friction To Show our understanding of the force of friction Success criteria: To be able to solve friction equations using F f, F n, and μ To be able to solve friction equations using F f, F n, and μ

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Lab Results Which type of shoe had the highest mu? Why was that? Which type of shoe had the highest mu? Why was that?

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Turn in homework and lab write ups Turn in homework and lab write ups

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Ignoring the slippery when wet sign, a 150 kg man steps carelessly. What is the coefficient of friction if the force of friction was 25 N? Ignoring the slippery when wet sign, a 150 kg man steps carelessly. What is the coefficient of friction if the force of friction was 25 N?

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A glacier has a mass of 5x10 10 kg and moves at a constant velocity of.5 m/day. If the force of friction between glacier and rock is.2, what is the force of friction scraping the rock below the glacier?

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Slip tech is a product that treats surfaces to make them less slippery. If a 200 kg man stepped on each of these materials, how much more force of friction would he have with this product? Slip tech is a product that treats surfaces to make them less slippery. If a 200 kg man stepped on each of these materials, how much more force of friction would he have with this product?

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A 20 N block is being pushed across a horizontal table by an 18 N force. If the coefficient of kinetic friction between the block and the table is 0.4, find the acceleration of the block.

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A 55 N block is being pushed across a horizontal table by an 25 N force. If the coefficient of kinetic friction between the block and the table is 0.2, find the acceleration of the block.

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A 20 N block is being pushed across a horizontal table by an 18 N force. If the coefficient of kinetic friction between the block and the table is 0.4, find the acceleration of the block. a) 0.5 m/s 2 b) 1 m/s 2 c) 5 m/s 2 d) 7.5 m/s 2 e) 9 m/s 2

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Friction Video

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Quiz

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OOO What still confuses you about friction? Out:

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Slide 1Fig. 19.1, p. 582. Slide 2Fig. 19.2, p. 583.

Slide 1Fig. 19.1, p. 582. Slide 2Fig. 19.2, p. 583.

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