Torture

What type and areas of physics are demonstrated and applied in medieval torture devices. Such as: Pear of Anguish, Scavenger's Daughter, Judas Cradle, Rack Torture,Breast Ripper, Head Crusher, Iron Maiden, Spanish Tickler, Thumbscrew Torture, Foot Roasting, Heretics Fork, Lead Sprinkler, Knee Splitter, Toe Wedging, and The Pendulum.