A block of mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is mu and the acceleration due to gravity is g, what is the minimum force required to be applied by the finger to hold the block against the wall?

A block of mass M is held against a rough vertical wall by pressing it

1.	A block of mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is mu and the acceleration due to gravity is g, what is the minimum force required to be applied by the finger to hold the block against the wall?
Answer» `mu MG` `M g` `(Mg )/(mu)` `2 MUM g` SOLUTION :`(Mg )/(mu)`