How Do You Calculate Final Velocity and Time for an Object on a Sloped Surface?

[murphy1935]

Homework Statement

A 20kg object is on a 10 m long, 15 degree slope , that has a coefficient of friction that is 0.2 Calculate the time to slide down the final velocity at the bottom

2. Homework Equations [/b

Fg=mag
Fn=Fgcos(theta)
Fp=Fgsin(theta)
mu=Ff/Fn
Fr=MAr

The Attempt at a Solution

I have gotten to the Fr=MAr stage, but after that where you substitute for Vf, Vi, S, Ar, and T; I have gotten stuck.

Any hints or tips would be greatly appreciated, thanks for your time

 

[rock.freak667]

Find the resultant acceleration.
Find the final velocity with conservation of energy.
Use v=u+at and find t.