1. The problem statement, all variables and given/known data An object of mass .5 kg is hung from the end of a steel wire 2m in length and .5mm in diameter. The mass is lifted a distance h and then dropped (creating a 'jerk') What is the largest value of h if you don't want the wire to break? Ultimate Strength: 1.1E9 N/m^2 Young's Modulus: 2E11n N/m^2 g=9.8 m/s^2 A=Pi(r^2) = Pi(0.0625) mm^2 = Pi(6.25E-5) m^2 2. Relevant equations F = -kx = ma h=mgLo/AY k= -AY/Lo 3. The attempt at a solution I know the ultimate strength may not be exceed w/o wire breaking. So Force(down) < or = 2E11 N/m^2 But, I am unsure of what the force(down) would be with the given information. Force(down)=mgh ? = (AY/Lo) x , where x=2h ?