(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A book has a mass of 400 g. When you slide the book against the floor with 5 N, it accelerated at the rate of -1.5 m/s^2. What would the coefficient of friction between the book and the floor be?

2. Relevant equations

F_{f}= μF_{N}

3. The attempt at a solution

I am trying to learn physics on my own solely through whatever reliable resources i may stumble upon on the internet. So bear with me if my answer or my method is not correct. Anything I know about physics is self taught(trying to prepare for college)

I tried it a few different ways

F_{f}= μF_{N}

5N=μ(.4x9.8)

5N=μ(3.92)

5N/3.92=μ

1.276=μ

5N=μ(.4x-1.5)

5N=μ(2.666[STRIKE]6[/STRIKE])

5N/-.26666[STRIKE]6[/STRIKE]=μ

8.75=μ (i know this cant be right)

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# Homework Help: Coefficient of friction

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