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## Homework Statement

http://nplq1.phyast.pitt.edu/res/msu/physicslib/msuphysicslib/13_EnergyConservation/graphics/prob27a_MechEnWFriction.gif

When mass M is at the position shown, it is sliding down the inclined part of a slide at a speed of 2.07 m/s. The mass stops a distance S2 = 1.9 m along the level part of the slide. The distance S1 = 1.18 m and the angle q = 32.50°. Calculate the coefficient of kinetic friction for the mass on the surface.

## Homework Equations

F=ma

[tex]v^2=v_0^2+2ax[/tex]

[tex]\mu_k=\frac{f}{F_n}=\frac{mgsin(\theta)-ma}{mgcos(\theta)}[/tex]

## The Attempt at a Solution

OK, I've been having trouble with this problem for a while now. Basicaly using the equations above I've tried to solve for a and plug that into the last formula there to get the coefficient of friction. However, this is proving to be very difficult for me, as I can't seem to combine the motion on the incline and the motion on the flat surface to find out what a on the incline is. I'm assuming that the accelerations are different for the two sections, and there is no indication that the coefficient is the same on the flat surface. I'm only interested in the friction on the incline, I believe.

Anyway, if anyone could offer a pointer I'd greatly appreciate it. I've been working on this a while and I can't seem to tell if I'm on the right track. Thanks!

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