How to find velocity given coefficient of friction, distance, mass and v1?

1. May 13, 2009

Ingrid44

1. The problem statement, all variables and given/known data

calculate the final velocity of an object sliding across a surface with a coefficient of friction of 0.2, a distance of 3m, an initial velocity of 50m/s and the object's mass of 100kg.
μ=0.2
v1= 50m/s
d=3m
m=100kg
v2= ?

2. Relevant equations
I know
F= μ*normal force (mg)
Kinetic Energy= 1/2mv^2

3. The attempt at a solution
I am confused and cant see how to get to the answer. Sorry, its been long since I took physics, I will really appreciate some help. Just the process of getting there. THANK YOU :)

2. May 13, 2009

diazona

Here are a couple more equations for you:

$$W = Fd$$

$$W = \Delta K$$
(K is kinetic energy)

Does that help?

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