Assembly questions are half the CSWA. They supply the parts, describe the
mates in words, and ask for the assembly's center of mass. This calculator combines two components the way
the exam expects — enter each part's mass and centroid, get the combined mass and COM.
Tool · Assembly Center-of-Mass Calculator (two components)
Combine two parts' centers of mass
COM = Σ(mᵢ·rᵢ) / Σmᵢ, done per axis. Read each component's mass and centroid from its own Mass Properties (relative to the assembly coordinate system), then combine here.
Component A
Component B
Result appears here.
Before you compute: if the assembly is symmetric about a plane, predict which COM
coordinate must stay put. In the default values (a base with a centered cap) x and y stay at 50 and 30.
Drill · Mates and Degrees of Freedom
Match each situation to the right mate or idea. Check when done.