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

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Presentation on theme: "November 4 physics physics Gateway High School Olycasts Gateway High School Olycasts."— Presentation transcript:

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

2 Table of Contents #. Date Title-Page – Page Number 20. October 5/6 Newtons Laws October 7/8 Newtons Law Problems – October 11/12 Newtons Second Law Lab October 14/15 Newtons Second Law Lab II October 18/19 Newtons Law Quiz October 20/21 Friction – October 22/November 1 Friction II November 2/3 Mu of the Shoe Lab November 5 Friction Quiz- 75 1

3 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?

4 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

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

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

7 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?

8 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?

9 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?

10 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.

11 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.

12 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

13 Friction Video

14 Quiz

15 OOO What still confuses you about friction? Out:


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