A 200 kg load is hung on a wire on length 4.00 m, cross-sectional area 2.00 x 10-5 m2, and Young's modulus 80.0 GPa. What is its increase in length (in millimeters)?

Answer 1

Youngs Modulus = Stress / strain

Stress = Force / area of cross section

Strain = Change in length/ Original length

Force = Mass*g =200*9.8 N

Original length =4m

Area =2.0*10 ^-5 m²

Y = 80.0 *10⁹ Pa

Plug in to get Change in length in m

Then change in mm