⢠Build a rigid body using nodes + members.
⢠Set the Moment Center (node or anywhere). Apply a Force at a node.
⢠The app draws the line of action and the perpendicular âstringâ distance d, then computes M = F¡d (sign from rĂF).
⢠âShow Rotationâ spins the body continuously in the net moment direction; âShow Original Positionâ stops and reverts.
⢠Set the Moment Center (node or anywhere). Apply a Force at a node.
⢠The app draws the line of action and the perpendicular âstringâ distance d, then computes M = F¡d (sign from rĂF).
⢠âShow Rotationâ spins the body continuously in the net moment direction; âShow Original Positionâ stops and reverts.
Nodes
| # | x | y | Del |
|---|
Members
| # | i | j | Del |
|---|
Moment Center
Tip: In canvas, choose Set Moment Center and click anywhere.
Force (at Node)
(θ from +x, degrees)
String Method Output
d = perpendicular distance from center to line of action
d = perpendicular distance from center to line of action
â
F = (0, 0)
|F| = 0
d = 0
M = F¡d = 0 kN¡m
Sign: â
|F| = 0
d = 0
M = F¡d = 0 kN¡m
Sign: â
â
Notes:
- Moment sign uses M = (rĂF)z where r = (P â C).
- Distance uses closest point from center to line of action.
- Rotation amplitude is scaled + clamped for readability.