Talk:A-level Physics (Advancing Physics)/Stress, Strain & Young's Modulus/Worked Solutions

IN Question 1 the cross sectional area is given as 0.5mm^2. Converting this to m^2 gives 0.5 x 10^-6 not 10^-3 as shown in the solution.

Question 5 and the Young's Modulus of "wire"
Question five: 50N are applied to a wire with a radius of 1mm. The wire was 0.7m long, but is now 0.75m long. What is the Young's Modulus for the material the wire is made of? Answer: (50 x 0.7)/(0.05 x (pi x 0.001^2) = 2.23x10^8 = 223MPA.  What metal has this modulus?  See https://www.engineeringtoolbox.com/young-modulus-d_773.html -- Guy vandegrift (discuss • contribs) 17:39, 19 January 2023 (UTC)