Jawabanmu

2014-03-22T19:21:48+07:00
F= m.g => 0,5 * 10 = 5 N
A= 0,5 cm -> 0,5 . 10^-3 meter = Diameter
  = L O=>   1/2 \pi^2 d^4 ⇒  4,9298 .  0,0000000000000625 = 0,0000000000003081125

tegangan = F÷A = 5/0,0000000000003081125 = 0,0000000000015405625
regangan =  deltaL / L0 = 10^-3 / 0,8 =  0,00125 Meter
Modulus young = tegangan / regangan = 0,00000000123245 N/m^3