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I would be grateful for your assistance with an equation regarding the force of a punch and increased force impact with a ring, with the same punch. A stiletto impact comparison. The Ring increased impact; hardness and surface area. Ring material; Stainless steel: 7.5 Mohs: Bulk Modulus mean 185. Granite: 6.5 Mohs: Bulk Modulus mean 40. Human bone 5 Mohs: Bulk Modulus mean 14. Body Wt 85kg x Fist surface area 7.5cm x 5.5cm Body Wt 85kg x Fist surface area 7.5cm x 5.5cm x Ring wt 18gr x surface area 17×17mm The conventional punch measured 148 kg. Punch speed about 20 miles per hour. Punching forces in amateur boxing are around 2500 N @ 70 kg. Exert about 700 N of force on the ground just stood still, punching force about 3.5 times body mass. Punch speed 80 ms Kind regards Ian Harris
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