Blender Secrets - Slow-Motion Cloth Simulation
To simulate a piece of cloth moving in ultra slow motion, is actually very easy.
First we add a cloth modifier to this subdivided plane, and a collision modifier to this sphere.
Then, set enough keyframes in the render settings.
Similarly, set enough keyframes in the cloth cache settings.
Now simply change the value in the Speed Multiplier to something smaller, like 0.05.
Then play the simulation by pressing the Spacebar.