For an object pulled or pushed horizontally‚ the normal force - N - is simply the weight: N = m g (2) where m = mass of the object (kg‚ slugs) g = acceleration of gravity (9.81 m/s2‚ 32 ft/s2) Frictional Coefficients for some Common Materials and Materials Combinations Materials and Material Combinations Static Frictional Coefficient - μs Clean and Dry Surfaces Lubricated and Greasy Surfaces Aluminum Aluminum 1.05 - 1.35 0.3 Aluminum- bronze Steel 0.45 Aluminum Mild Steel 0.61 Brake material
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Coefficient of Kinetic Friction Objective: After completing this experiment‚ you should be able to measure the coefficient of sliding friction of an object that is located on an inclined plane. Apparatus: Inclined Plane Pulley attachment for plane Wooden blcok‚ with hook attached Meterstick Felt Set of masses String Protractor Procedure: 1. Place the board in the position shown in Figure 7-1. 2. The angle of the board should be small enough so that the wooden block will not slide
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Friction Friction Abstract Students learn the principles of friction by demonstrating the effect weight‚ angle and gravity on the speed of movement of objects. of Equipment 1. Friction Boards 2. Weights 3. Velcro Ball Game 4. Drill 5. ¾” Dowels 6. Rope 7. 3 x 8’ Flat Board 8. Styrofoam Boards 9. Bucket 10. Beer Glass 11. Decorations for Tortoise 12. Hairspray 13. Bennie Beads 14. Velcro 15. Hand Held Lenses 16. Drill Board Grade Level This activity is suitable for Middle and High School
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Experiment 5: Friction Laboratory Report Charles Sanchez‚ Geminesse Sianghio‚ Ferguie Solis Department of Chemistry College of Science‚ University of Santo Tomas España Street‚ Manila Philippines Abstract In this experiment‚ a block of wood is used to observe friction on different surfaces such that an extra weight is also added to the block of wood to measure the same units under the different surfaces. With also the use of lubircant a member of the group was asked to observe the
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Friction Definition: Friction is the force resisting the relative lateral (tangential) motion of solid surfaces‚ fluid layers‚ or material elements in contact. Force of friction:- Friction is a force that is created whenever two surfaces move or try to move across each other. • Friction always opposes the motion or attempted motion of one surface across another surface. • Friction is dependant on the texture of both surfaces. • Friction is also dependant on the amount of contact force pushing
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Friction Peter Jeschofnig‚ Ph.D. Version 42-0262-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information
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Coefficients of Friction Discussion: Friction is the force that resists motion and can be determined in either static situations or kinetic situations using the following equation: [pic] Static friction is the amount of friction that resists the start of motion and kinetic friction resists an object’s continued motion. The coefficient of friction depends on a number of factors including surface area and the types of surfaces in contact. The only way to determine a coefficient of friction is experimentally
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Collazo 1 Asia Lee Collazo English Comp. I Professor J. Mohan February 14‚ 2013 “False Appearance’s” We are confronted with many different images of others. These false images can either be externally imposed or internally fabricated. In either case‚ one must have the courage to look through this ignorance so that ones true self can be exposed. After reading Mirrors it was obvious that‚ Lucy Grealy cared what others thought about her physical appearance. In time‚ however
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ENC1102 SUMMER II 2013 FICTION EXAM Choose the best answer that completes each statement. There is only ONE correct answer for each. Please mark your answers clearly by highlighting your answer. Each multiple choice question is worth one point. 1.) How did Miss Emily‚ in “A Rose for Emily” react when the town’s ladies called to offer condolences on her father’s death? A.) Met them at the door with a horsewhip B.) She begged them for financial help C.) She insisted
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Friction is the force resisting the relative motion of solid surfaces‚ fluid layers‚ and material elements sliding against each other. There are several types of friction: Dry friction resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into static friction ("stiction") between non-moving surfaces‚ and kinetic friction between moving surfaces. Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other.[1][2]
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