Joint Push Pull Interactive is a powerful extension suite for SketchUp, developed by Fredo6, that expands the native face extrusion functions. While traditionally known as a free plugin, recent versions have transitioned to a paid model (approximately $15 for a perpetual license), though a 30-day free trial remains available for new users. Core Capabilities
It’s time to go Joint. Push and Pull. Interact. And set yourselves Free. joint push pull interactive free
Just like the native Push/Pull, you can type negative numbers (e.g., -5) to cut into the object rather than adding to it. Joint Push Pull Interactive is a powerful extension
Best for: Coders and advanced students. The OSP library contains a Java simulation called "Levers and Joints." With a compatible browser plugin, you can build a custom two-bone structure, assign a push force at the insertion point, and watch the angular acceleration. It is the most mathematical of the free options. Push and Pull
SketchUcation ExtensionStore: It is highly recommended to install the ExtensionStore tool first, which simplifies the process of installing and licensing the actual JPP extension.
Unable to install Joint-push/pull - Extensions - SketchUp Community