Finding the coefficient of Friction

  • Thread starter Simpleshot
  • Start date
  • #1

Homework Statement



A book has a mass of 400 g. When you slided the book against the floor with 5 N, it accelerated at the rate of -1.5 m/s2. What would the coefficient of friction between the book and the floor be?

Homework Equations



F = ma

W = mg

FN = - mg

The Attempt at a Solution


m=.400
fa: 5N
FN= 3.9 N
A: -1.5m/s

Can someone please explain how I should be finding the force of friction?
 

Answers and Replies

  • #2
PhanthomJay
Science Advisor
Homework Helper
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Your relevant equations should list the friction force formula (as a function of the coefficient of friction and the normal force).
Also, it's not F=ma, it's Fnet = ma, so calculate the net force and from that you can get the friction force.
 

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