Modeling Friction Forces Lab
Isaiah Hernandez, Tony Wu, Leslie Zho
Sept. 12, 2016
Purpose:
Perform a series of experiments to determine the coefficient of static and kinetic friciton of the back side of a white board on a block with a layer of felt.
Theory/intro:
Static friction is the force acting on an object that opposes the direction of motion in order to keep the object from moving (static: all forces cancel each other out in the x and y planes.)
Fsmax = μs η
Kinectic friciton is the force acting on a moving object that opposes the direction of motion.
Fk = μk η
Static friction is the force acting on an object that opposes the direction of motion in order to keep the object from moving (static: all forces cancel each other out in the x and y planes.)
Fsmax = μs η
Kinectic friciton is the force acting on a moving object that opposes the direction of motion.
Fk = μk η
A summary of apparatus:
We were required to perform 5 different experiments revolving around the general concept of friciton (Kinetic and Static). We performed 4 trials and recorded corresponding data for each case. Amongst these cases were:
1. Static friction on a flat surface.
2. Kinetic friction on a flat surface.
3. Static friction on an incline.
4. Static friciton on an incline.
5. Kinetic friction acting on a mass-pulley system.
Table of measured data:
Graph (Weights v. Mass) for Test 1 involving static friciton on a flat surface:
Graph (N v. Fricitonal Force)for Test 1
Graphs of calculated results:
Explanation of graph:
The graph for the calculated results depicts the experimental measurements and results for the coefficient of both kinetic and static friction coming from the board and acting on the block in each of the 5 cases.
Conclusions:
The results from the experiment show that the acceleration of a system is directly affected by the mass of the object being analyzed. As the a mass of the object increases, the acceleration decreases due to the opposite dirction of the friction force on a moving/static object.
Graph (Weights v. Mass) for Test 1 involving static friciton on a flat surface:
Graph (N v. Fricitonal Force)for Test 1
Graphs of calculated results:
Explanation of graph:
The graph for the calculated results depicts the experimental measurements and results for the coefficient of both kinetic and static friction coming from the board and acting on the block in each of the 5 cases.
Conclusions:
The results from the experiment show that the acceleration of a system is directly affected by the mass of the object being analyzed. As the a mass of the object increases, the acceleration decreases due to the opposite dirction of the friction force on a moving/static object.
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