Lab6-LM

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Collin County Community College District *

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1401

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Physics

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Apr 3, 2024

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Experiment 6: Friction 3/12/2024 Student Names: Lohan Molinar REPORT PHYS-1401.031 Instructions 1) Follow all of the lab activity steps given in the Lab Procedure. 2) 3) 4) Attach additional sheets of paper that clearly (NEATLY) show all of your calculations performed during this experiment. Results 1) What are potential sources of systematic error in this experiment? Given your data acquired in the lab, do you think these sources of systematic error had a significant effect on your results? Why or why not? Write out your answer in a clear and well supported paragraph. 2) In part B, the lab procedure instructs you to adjust the pulley so that the string connected to the the track? Write out your answer in a clear and well supported paragraph. 3) Did the kinetic frictional coefficient (for the wood/aluminum and felt/aluminum cases) vary Attach your completed data tables to this page. TYPE YOUR ANSWERS IN THE PROVIDED SPACES below & in your data tables. The friction between the track and the block could have caused some errors. We wiped down the track at the beginning of the experiment to help remedy any rough spots. But when we noticed that the block kept slowing down or tripping consistently at a particular place, we would have to wipe down the track again. Sometimes, this helped; sometimes, it didn't, which could have contributed to finding a mass that provided a constant velocity of the block. So, we had to pick the best out of what we had since some trials weren't 100% consistent with the velocity. Then, we wiped down when necessary and found the minimum weight needed to create as much of a constant velocity as possible. Seeing that we tried to work around that problem, I don't know if this error highly influenced our experiment. block is parallel to the track. How would your results be affected if the string was not parallel to The normal force would have been affected if the string was not parallel to the track. If the string had created a smaller angle, the normal force would have been weaker, pushing down on the block; thus, more friction and force would have been necessary to move the block. If the string were at a greater angle, then less force would be required to move the block, and less friction would occur, significantly if the string lifted the block enough that the whole base would not been in contact with the track. with normal force ? Give your conclusions and support them based on your experimental results from Parts A and B . Write out your answer in a clear and well supported paragraph. f = µ N. Kinetic frictional coefficient will not vary with the same normal force. Looking at the equation, if the normal force increases, the friction force will grow, but the kinetic friction coefficient is always a constant for a given system. The kinetic friction coefficient will not change when the normal force changes. The average coefficients for the wood on aluminum and felt on aluminum were 0.245 and 0.297, respectively. The mass was not the same, meaning the normal force changed based on friction force and material, and that alone.

Experiment 6: Friction 3/12/2024 Group Members Names: Lohan, Carlo, Jahziel DATA PHYS-1401.031 Table 1: Wood on Aluminum 135.35 g 49.91 g q 13 degrees 0.231 14.5 degrees 0.259 0.245 Table 2: Felt on Aluminum 135.35 g 49.91 g q 15 degrees 0.268 18 degrees 0.325 0.297 Table 3: Wood on Aluminum 135.35 29.05 270.7 g 0.188 299.75 g 0.208 0.198 % diff = 25% Table 4: Felt on Aluminum 135.35 59.84 270.7 g 0.166 330.54 g 0.202 0.184 % diff = 7.91% A. Determination of m k (inclined plane) m b = m w = m k m b m b + m w Average m k = m b = m w = m k m b m b + m w Average m k = B. Determination of m k (connected masses) m b = m w = m h m k m b m b + m w Average m k = m b = m w = m h m k m b m b + m w Average m k =

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