Finding the coefficient of kinetic friction

  • #1

Homework Statement



A 50 kg block slides down a 32° ramp with an acceleration of 3.2 m/s2.
What is the coefficient of kinetic friction between the block and the ramp?

Homework Equations


[tex]\mu[/tex]kinetic=[tex]\frac{f_{kinetic}}{F_{normal}}[/tex]


The Attempt at a Solution



I have gone through many attempts, but all of them just don't seem right...could someone please explain it plain and simple?
 

Answers and Replies

  • #2
nicksauce
Science Advisor
Homework Helper
1,272
5
Hi physics_fool, welcome to PF. The usual algorithm for solving such problems is:

1) Draw a free body diagram, identifying the forces. There should be weight, friction, and normal force.
2) Use Newton's second law, F=ma, to find the force of friction
3) Use Force of friction / Normal Force = coefficient of friction

So what are the components of the forces in each direction?
 
  • #3
That's the question as it was given...

but for your second question, isn't that to find the net force...not the force of friction?
 
  • #4
Ok...nvm. I got it...thanks anyways:smile:
 

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