Use Animation to create presentation-worthy animations for motion that does not require accounting for mass or gravity.
Use Basic Motion to create presentation-worthy approximate simulations of motion that account for mass, collisions, or gravity.
Use Motion Analysis to run computationally strong simulations that take the physics of the assembly motion into account. This tool is the most computationally intensive of the three options. The better your understanding of the physics of the motion you require, the better your results. You can use Motion Analysis to run impact analysis studies to understand component response to different types of forces.