Question 1161490
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<pre>

The law of energy conservation says that the initial kinetic energy is equal to the work of the friction  force


    {{{(mv^2)/2}}} = k*m*g*x


Cancel the common factor "m" (the mass) in both sides. Then substitute the given data and find the the length x 
"how far it will go".

    {{{3.5^2/2}}} = 0.15*9.81*x

    x = {{{3.5^2/(2*0.15*9.81)}}} = 4.16 meters.    <U>ANSWER</U>
</pre>

Solved.