Tinkercad is a free browser 3D program that allows users to simulate gravity and different materials. It can be used to create structures such as marble runs, nail boards, and pachinko machines. The program is easy to learn and can be used to draw and print objects with a 3D printer or laser cutter. Tinkercad now allows users to activate gravity and assign different materials to objects, allowing for realistic simulations. To switch to simulation mode, users simply click on the apple button. Gravity can be activated and stopped using the play button, and a timeline allows users to scroll back and forth. Objects in the simulation are movable unless marked as immobile. Materials can be assigned to objects, and the friction and density of the materials can be adjusted. Users can create simulations with inclined planes and observe how different materials slide at different distances. Tinkercad also provides ready-made models for users to experiment with, such as marble runs and pachinko machines. While Tinkercad does not provide fully accurate simulations, it is a fun and easy way to experiment with physics concepts virtually.
