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Force of friction
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- Words:
- 1635
- Submitted:
- Thu Nov 05 2009
- Mark submitted by Author:
... Kwun Tong Government Secondary School Advanced Level Physics (TAS) Experiment Report Experiment No.: 1 Title: Force of friction Date of Experiment: 2006/10/31 Mark: Sch. Code 2114 TAS Group 15 Name: Chan Man Lok Class: S.6C Class No.: 16 Objective: 1. To study the effects of the normal force, and surface area on the force of friction using a block. 2. To estimate the coefficients of static and kinetic friction. Apparatus: Instrument Description Wooden block x 4 200g x 4 Spring balance x 1 DCS/PL/2-2 0 - 10N The smallest division = 0.2 N Tripe beam balance x 1 0 - 500g The smallest division = 0.1g Frictional paper x 1 / Rubber band Several / Theory: Limiting static friction : Friction always opposes motion. Larger forces tending to produce the motion, larger friction is. However, it cannot increase indefinitely. For example, when a body is in contact with a rough surface frictional forces arise at the contact surface if the body is subjected to an applied force. When the applied force exceeds the limiting static friction , the body will start to slip over the rough
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