Web Analytics
Answered

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.

Verified Answer :

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.

Related Questions