# FM

The FM function computes the magnitude of the resultant translational force acting at marker I (obtained by vector summation), due to all applied forces and constraints that act between marker I and marker J.

FM(I, J)

## Description

Markers I and J must be specified.

## Arguments

I
The marker at which the resultant force is to be computed.
J
The second marker such that all forces between markers I and J are to be summed up at the marker I location.

## Example

<Post_Request
comment             = "LINSPL-iord 0-1-2 FM-TM-MODE"
id                  = "4"
type                = "EXPRESSION"
expr1               = "NULL"
expr2               = "LINSPL(TIME,0.0,301001,0)"
expr3               = "LINSPL(TIME,0.0,301001,1)"
expr4               = "LINSPL(TIME,0.0,301001,2)"
expr5               = "NULL"
expr6               = "FM(30102012,30101012)"
expr7               = "TM(30102012,30101012)"
expr8               = "IF(MODE-4:1,2,3)"
/>