# Changes

## Dragging motion for pile of blocks

, 00:55, 23 November 2010
no edit summary
* $\mu_{s2}$ is the limiting coefficient of static friction between $A$ and $B$.
* $\mu_{k2}$ is the coefficient of kinetic friction between $A$ and $B$.

[[File:Pileoftwoblocks.png|thumb|500px|right]]
==Case of force on lower block==