Finding the Coefficient of Kinetic Friction Using Acceleration Data

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SUMMARY

The discussion focuses on calculating the coefficient of kinetic friction (u_k) using acceleration data from a physics experiment involving a wooden block weighing 255.2 g. The experiment involved measuring the block's acceleration with and without an additional 500 g weight. The relevant equation is derived from Newton's second law, where the frictional force is expressed as f = (u_k)N = (u_k)mg. The user seeks clarification on how to relate acceleration (a) to the coefficient of kinetic friction, specifically questioning if the equation a = (u_k)g is valid.

PREREQUISITES
  • Understanding of Newton's second law (F = ma)
  • Knowledge of frictional force concepts in physics
  • Familiarity with the equation for gravitational force (mg)
  • Basic skills in experimental data analysis
NEXT STEPS
  • Study the relationship between acceleration and frictional force in physics
  • Learn how to calculate the coefficient of kinetic friction using experimental data
  • Explore the impact of mass on acceleration and friction
  • Review lab techniques for measuring acceleration and forces accurately
USEFUL FOR

Students in physics courses, educators teaching mechanics, and anyone conducting experiments related to friction and motion analysis.

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Homework Statement



Hello. I am working on a physics lab where we pushed a wooden block (weighed at 255.2 g) towards a motion detector. Through this we were able to determine its acceleration.

After five trials we repeated the experiment, but with an additional 500 g weight on top.

From this data I need to find the coefficient of kinetic friction.

Homework Equations



f = (u_k)N = (u_k)mg


The Attempt at a Solution



I know mg, but I don't know the frictional force or u_k. Only one of these have to be known, but I'm not sure how to get there using the acceleration of the block.
 
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since
ma = (u_k)mg

Can I just say:
a = (u_k)g ?
 

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