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Lab 105 - LAB 105 Mehar Ghei LABORATORY EXPERIMENT REPORT...

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LAB 105 Mehar Ghei LABORATORY EXPERIMENT REPORT Name: Mehar Ghei Group Members: Nicole Tran, Yvunne Chen, Nakib Junayed Experiment Date: Tuesday, October 12, 2010 Course Name: PHYS 111A Section: H01 Instructor: Beidi He LABORATORY #105 Coefficient of Static Friction 1. OBJECTIVE Calculate the coefficient of static friction, µ s, between the surface and the box through experimentation and verify that it is independent of the normal force, N. 2. THEORETICAL BACKGROUND The force of static friction, F s , equals F s max when the body is on the verge of slipping. When F s is zero, there is no friction. = Fs µs N µ s depends only on the nature, texture, of the objects and surfaces in contact with each other. The graph of F s max vs. N is a linear, where the slope is µ s . We know from Newton’s Second law that = F ma In these experiments, the body is not accelerating, which cancels out the mass*acceleration, and leaves = ⅀F 0 Aside: Because all the components and the calculations are multiplied by the force of gravity, 9.8m/s 2
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