A test question that has been bugging me all day.(cant figure it out)

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The discussion revolves around a physics test question involving a particle rolling up an inclined plane with given parameters. The key points include calculating the acceleration due to friction, considering the initial and final velocities, and the effects of friction on the particle's motion. The user is confused about whether the provided frictional force refers to Newtons or the coefficient of friction. They mention using the work-energy principle to approach the problem but seek guidance on how to proceed. Clarification on these concepts is essential for solving the question accurately.
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well i had a test today and one of the questions was this.

:A particle particle mass of 25g rolls up and inclined palne of 20 degree with a Velocity intial of 3.0m/s, there is a frictional force of .4 and at point x2 the velocity is 1.0m/s

What is the acceleration due to friction?

I have been thinking about this since 3 and had to work but i was on my mind the whoe time. I've tried useing K1+U1-Wother=K2+U2
if you can lead me as to where to go with this it would be appreciated.
 
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Is that the frictional force in Newtons or the coefficient of friction?
 
that would be the coeff of Fkinetic
 

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