- #1

schyuler2

- 8

- 0

## Homework Statement

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.

## Homework 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]

## 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