Comic-book superheroes are sometimes able to punch holes throughsteel walls. (a)
ID: 1678424 • Letter: C
Question
Comic-book superheroes are sometimes able to punch holes throughsteel walls. (a) If the ultimate shear strength of steel istaken to be 2.90 x109 Pa, what force is required to punchthrough a steel plate 2.00 cm thick?Assume the superhero's fist has cross-sectional area of1.00 x 102cm2 and is approximately circular._______________N
(b) Qualitatively, what would happen to the superhero on deliveryof the punch? What physical law applies? I tried using F=P*A but I keep getting thewrong answer on webassign. (a) If the ultimate shear strength of steel istaken to be 2.90 x109 Pa, what force is required to punchthrough a steel plate 2.00 cm thick?Assume the superhero's fist has cross-sectional area of1.00 x 102cm2 and is approximately circular.
_______________N
(b) Qualitatively, what would happen to the superhero on deliveryof the punch? What physical law applies? I tried using F=P*A but I keep getting thewrong answer on webassign.
Explanation / Answer
s= f/a=>f=s*a= (2.90*108Pa)(1*10-2m^2) =2.90*106=307.4N