Assume that the force is applied equally along the whole width of the foil, and

Question

Assume that the force is applied equally along the whole width of the foil, and that you are trying to pull perpendicular to the cross section.

3)Aluminum has a shear strength of 210 megapascals. When youbend aluminum foil around an edge (i.e., the edge of the box) andpull, you are effectively applying a shear force along the bentedge of the foil. If a roll of household aluminum foil is 30.0centimeters wide and its thickness is approximately 15.0micrometers, how much shear force is needed to pull off asheet?

Assume that the force is applied equally along the whole widthof the foil. (Express your answer in newtons to three significantfigures.)

Explanation / Answer

1) Tensile Strength = Force/Area....area used is side B
233N/7.50*10^-7 = 3.10667E^8, but it asks for it in Mega, which comes to 310MPa rounded

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