Need help find μ (Coefficient of Friction)

[Sewoon]

Im designing a lab, in which i need to find the kinetic μ for a specific surface by sliding 6 different masses from the top, and taking the time it takes to reach the bottom. This surface is 30 degrees from the floor, making it a ramp. I will know the distance the masses cover.


Some relevant equations are -
F=ma
Ff=Nμ
Fr=F-Ff
d=vi(t)+(at^2)/2
v=d/t

What i did was to, drop the 6 masses from the top and take the time it takes to get to the bottom. From there u can find the v and acceleration. According to me, with acceleration you can find the Force of friction since you know the normal...I'm not sure if this is correct. If wrong, what do i need to find the μ of a surface in an experiment.
Thanks

 

[BigJDubs]

.Yes, what you have proposed is a valid approach to calculating the coefficient of kinetic friction (μ). To find μ, you need to calculate the normal force (N) and the frictional force (Ff). You can do this by taking the mass of the object (m) multiplied by acceleration due to gravity (g) to get N, and then use Ff = Nμ. You can then calculate the frictional force (Fr) by subtracting Ff from the total force (F) which you can calculate using F=ma. Once you have calculated Fr, you can rearrange the equation to solve for μ.