# Mechanics problem

1. Apr 23, 2012

### matematikuvol

1. The problem statement, all variables and given/known data
Homogeneous cube with one edge lying on the floor and the other on a smooth vertical wall. The underside of cube with a horizontal surface makes angle of
π6
.What is the value to the coefficient of friction between the cube and the floor to cube remain in balance.

2. Relevant equations
∑F=0

∑M=0

M=rF

M is momentum of force.

3. The attempt at a solution
In static case

∑F=0

∑M=0

I need help to write this equation from the problem statement. I don't have idea.
Because cube is homogenuous the forces are equal from all parts I suppose.

. Do you have any idea? I think this goes in one line but it is hard for me.

2. Apr 23, 2012

### tiny-tim

hi matematikuvol!
homogeneous simply means that (in this case) the weight goes through the centre of the cube

draw yourself a free body diagram

the main problem in this case is to find the horizontal distance between the centre and the bottom edge!

Last edited: Apr 23, 2012