Question

In order to determine its ultimate tensile strength, a strip of Teflon, 20 mm x 5 mm in cross-section, is subjected to an axial force until rupture occurs at 1.7 kN. What is the ultimate tensile strength of Teflon?

Answer 1

17 N/mm²

Step-by-step explanation:

Given data:

Cross-sectional area of the Teflon = 20 mm × 5 mm = 100 mm²

Tensile force at rupture = 1.7 KN = 1.7 × 10³ N

Now,

the Ultimate tensile strength is the maximum stress that can be applied to the material

stress is given as :

stress = applied force / Area

now, the maximum force that can be undertaken by the specimen is applied at the time of rupture

thus,

ultimate tensile strength of Teflon = Tensile force / Cross-sectional area

or

= (1.7 × 10³) / 100

or

ultimate tensile strength of Teflon = 17 N/mm²