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

Starting from rest, a toolbox slides 2 m down to the edge of a roof that has a coefficient of kinetic friction of 0.25. The roof is inclined 30 degrees from the horizontal. What is the speed of the toolbox when it reaches the edge of the roof?

2. Relevant equations

xf=xi+vi*t+a*t^2 (I think)

I also broke it down into components.

Sum of forces in the x

mgsin(theta)-fk=ma

Sum of forces in the y

N-mgcos(theta)=0

3. The attempt at a solution

I tried using this equation but i can't find the answer. I have used the position equation to find the distance but no. I want to use my components but is not giving me the mass of the object. So without the mass I am sort of lost in the problem. don;t even know where to begin! any help??

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# What is the speed of the toolbox?

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