This is the force–extension graph for a metal wire of length 2.0 m and cross-sectional area 1.5 × 10⁻⁷ m².

a. Calculate the Young modulus.
b. Determine the energy stored in the wire when the extension is 0.8 mm.
c. Calculate the work done in stretching the wire between 0.4 mm and 0.8 mm.

Transcribed Image Text:

10 8 0.2 0.4 0.6 0.8 1.0 Extension / mm Figure 7.20 4. 2. Force / N