Point Mass
Use the Point Mass node to add a discrete mass that is concentrated at a point.
The Point Mass Damping subnode can be added to specify a mass-proportional damping.
Point Mass
Enter a Point mass m.
Location in User Interface
Context Menus
Truss>Mass, Spring, and Damper>Point Mass
Ribbon
Physics tab with Truss selected:
Edges>Mass, Spring, and Damper>Point Mass