Heya, I am wondering how would one calculate or find the force associated with animals such as tigers, dogs, lions etc. At the moment, i am interested in finding how much force or pressure is created by a cat when it scratches. Any help would be appreciated, thank you. As a side note, this is mainly to find out how much, comparatively it takes to cut human skin, rough figuires online point me to about 400 pounds per square inch of pressure required to penetrate human skin but does that literally mean per square inch of skin or is that just a measurement? Do I find the area of a cats claw (somehow, not sure how I would do this, its very small) and then divide the 400 psi down to pounds per square millimeter or whatever the cats claw size is? Thank you again for any aid.