(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the initial speed of a block which travels 10m along a horizontal surface if [tex]\mu[/tex]= 0.40 between the block and the surface before stopping.

2. Relevant equations

[tex]\Sigma[/tex]W= 1/2mv_{B}^{2}- 1/2mv_{A}^{2}+ mgy_{B}- mgy_{A}

[tex]\Sigma[/tex]W=W* dAB * cos (W, dAB)

f = [tex]\mu[/tex]* N

N= mgsin[tex]\theta[/tex]

3. The attempt at a solution

so far i have:

[tex]\Sigma[/tex]W= 0

[tex]\Sigma[/tex]W=W_{N}+W_{W}+W_{f}

and

[tex]\Sigma[/tex]W=W_{W}* dAB * cos (270)

[tex]\Sigma[/tex]W=W_{W}* 10m * 0

not sure if i'm doing this right or where to go from here

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# Homework Help: Work Energy: block w/ friction

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