Why Do Ribbons Curl?

The video explains the physics behind ribbon curling, focusing on the concept of yield, where stress permanently deforms a material. A UK study analyzed this phenomenon, using PVC ribbons and a blade to demonstrate how the outside of a ribbon stretches and curls. The video highlights three main factors affecting curl shape: blade sharpness, speed of pulling, and weight applied. It concludes with tips for achieving the perfect curl and encourages viewer interaction through Patreon and YouTube.

How does the sharpness of the blade influence the tightness of the curls formed in the ribbon?

Explain the relationship between the weight applied to the ribbon and the tightness of the curls.