Pushing wooden creat - Friction

[kmikias]

Hi guys I always confuse on this question its all about force.

for example

Let say I am pushing a wooden creat across the floor at constant speed.and I decide to turn the creat on end,to reducing by half the area in the contact with the floor . ...so if i push the same creat acroos the same floor with the same constant speed ...Does the force equall or one half greater or what?

I am thinking it will be equall because area doesn't affect force. in the other hand i am thinking it one half because the friction will be less i guess.

I am just confuse?

 

[mgb_phys]

In simple terms friction only depends on the normal force (weight) and the material of the two surfaces - it is independent of surface area (except for very small surface areas when you get direct welding).

It is surprising to most people but it is true!