- #1

nickclarson

- 32

- 0

## Homework Statement

The coefficient of static friction between a truck and road surface is [tex]\mu[/tex][tex]_{s}[/tex]. What is the maximum acceleration of a four-wheel-drive truck of mass M if the road surface is at an angle of [tex]\theta[/tex] with the horozontal when the truck is...

a). Climbing

b). Decending

## Homework Equations

[tex]\textbf{F}_{s}[/tex] = [tex]\mu[/tex][tex]_{s}[/tex][tex]\textbf{F}_{n}[/tex]

## The Attempt at a Solution

I figured out the solution some how by magic but I really don't understand it fully. My problem is just setting up the free body diagram in general and knowing which direction the frictional force is pointing. I was also having trouble in knowing whether or not to include the force of the engine driving the car on the FBD.