A punch for making a slotted hole in ID cards is shown in the figure part a. Assume that the hole produced by the punch can be described as a rectangle (12 mm x 3 mm) with two half circles (r = 1.5 mm) on the left and the right sides. If P = 10 N and the thickness of the ID card is 1 mm, what is the average shear stress in the card?

 

OL J Se our Bum Chatelets PROBLEM 1.8-12 (a) P -12 mm- (b) 1 mm 1.5 mm mio A 11-8.1