Which statement is not true of Rigid Groups?

Rigid Groups in Fusion 360 are used to manage assemblies by treating multiple components as a single unit for movement and interaction. When using Rigid Groups, components can indeed be applied to assemblies that contain child components; this is a fundamental aspect of how they operate within the software.

The capability to create Rigid Groups is particularly useful because it allows users to simplify the assembly process by combining various parts into a cohesive system. This grouping helps maintain relative positions and orientations while allowing for movement, similar to the way rigid joints function. Therefore, the statement that Rigid Groups cannot be applied to components with child components is not accurate, as they can effectively encompass both parent and child components within an assembly.

Overall, understanding that Rigid Groups facilitate easier management of complex assemblies while allowing movement like rigid joints is essential for effective design and assembly within Fusion 360.