Block with vertical movement. Allows only one friction force, vertical or horizontal.
|Equations:||3 or 4 (if all the applied forces are vertical the block have 3 equation, otherwise have 4).|
|Name:||Name of the block.|
|a:||Acceleration of the block.|
|Relative to:||To default is sf meaning that the data is measured from a stationary reference system. But you can set a block whit horizontal movement, if the data is relative to that block.|