What happens to forces in biomechanics when an object is starting to tip?

[snav96]

Homework Statement

http://tinypic.com/r/sebqc1/8

Homework Equations

can anyone help me with this question? I know i have to use torques to find the answer but i have no idea how to solve it and write equations for it.
thanks

The Attempt at a Solution

 

[haruspex]

Homework Statement

http://tinypic.com/r/sebqc1/8

Homework Equations

can anyone help me with this question? I know i have to use torques to find the answer but i have no idea how to solve it and write equations for it.
thanks

The Attempt at a Solution

Yes, you need to use torques. What equations have you been taught relating to torques?
If it does start to tip, what will the forces on the object be, in what directions, and acting through what points?

 

[snav96]

Yes, you need to use torques. What equations have you been taught relating to torques?
If it does start to tip, what will the forces on the object be, in what directions, and acting through what points?

http://tinypic.com/r/161m64l/8
this is my attempt at the question.
if it tips would the forces along the y-axis get unbalanced? N> mg ?

 

[haruspex]

http://tinypic.com/r/161m64l/8
this is my attempt at the question.
if it tips would the forces along the y-axis get unbalanced? N> mg ?

If the y-axis forces are unbalanced, there would be a nonzero net vertical force. What would result from that?
In torque questions you have to pay close attention to the lines of action of forces.
Take it a little further... suppose it is starting to tip. Where is the normal force from the ground?