Michelle Portocarrero - Friction Lab

Michelle Portocarrero - Friction Lab - Friction Lab Name(s...

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Friction Lab Name(s): Michelle Po rtocarrero, Giovanny Alvarez Date: 10/16/18 Period: 2 Friction Lab Friction is a force that occurs when two surfaces TOUCH. In this lab you will investigate the factors that affect friction. You will measure frictional forces using a spring scale to measure the force. The factors being tested will include the effect of surface texture, weight and surface area contact on friction. In addition you will investigate the difference between “Static” and “Kinetic” friction. Materials: wood block with foam rubber side and sandpaper side, one bare wood block, a 200 N spring scale, 3 equal size books, wood strip to act as surface Surface Texture and Friction Hypothesis for Part A : Person 1: The smoother the texture of the bottom of the surface rubbing against the wood is, the less force will be needed to pull it. Person 2: If the bottom of a surface is smooth then the object would have less friction when rubbing aganist something Procedure: Part A-Surface Texture and Friction 1. Attach a 20N spring scale to the hook. All measurements are to be done in NEWTONS. 2. Lay the wood block sandpaper side down on the paper. Place one book on top of the block. VERY VERY slowly and evenly pull on the spring scale horizontal to the table while watching the measurement. Record the maximum force applied in Newton’s to the block BEFORE it begins to move. 3. When the block starts to move pull it across the paper strip AT A CONSTANT RATE. 4. Record the force needed to keep the setup moving AT A CONSTANT RATE. Repeat 3 times.
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