[Request] What are the approximate values of Force [N] acting on a stretched string in a guitar?

Could not find much info on that. When a standard set of guitar strings is stretched on a guitar and tuned to standard tuning, what is usually the force that keeps the string "stretched," if that makes any sense? Is it around 20N? 50? 100? I'm not looking even for the exact values, but an estimation, approximation.

Thanks in advance!