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## Homework Statement

A uniform board of length and mass lies near a boundary that separates two regions. In region 1, the coefficient of kinetic friction between the board and the surface is , and in region 2, the coefficient is . The positive direction is to the right.(Image uploaded)

Q.Find the net work done by friction in pulling the board directly from region 1 to region 2. Assume that the board moves at constant velocity

## Homework Equations

Work=ForceXDistance

F=muXN

## The Attempt at a Solution

i dont know ow to find F and don't know integration. So I am stuck on this problem.

Please help?