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20 March, 09:02

Given that the tensile strength of aluminum foil is 311 megapascals, its thickness is approximately 15.0 micrometers, and a roll of household aluminum foil is 30.0 centimeters wide, how much force f is needed to pull off a sheet to use? 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.

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  1. 20 March, 09:14
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    We need to know the area of the cross section of the sample before anything else. In this case, the aluminum sample has a width of 30.00 centimeters and a thickness of 15.0 micrometers,

    Area =.30 x. 000015 = 4.5 x 10^-6 m^2

    the tensile strength to be 311 MPa so,

    311x10^6 = F / 4.5 x 10^-6 m^2

    F = 1399.5 N is needed

    Hope this answers the question.
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