Jawabanmu

2014-06-12T16:40:55+07:00
Diket =>
l = 4 meter
A = 15 . 10^-5 m²
m= 330 kg
Delta l = 7 . 10^-4 meter

E = F x L / A x Delta L
F = W = mg
F = 330 x 10
F = 3300 N

E = 3300 x 4 / 15 x 10^-5 x 7 x 10^-4
E = 8,8 . 10^10 / 7

Maaf Kalo Salah