batang logam panjangnya 60cm dan luas penampangnya 3cm . modulus elastisnya sebesar 4x10^{6}N/m . tentukan tetapan pertambahan panjang , dan tegangan batang saat diberi gaya 15N !
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A = 3 cm = 0,0003 m^2
E = 4x10^6
Dit F dan Δl
jawab.
E =
E . A . Δl = F . l
4x10^6 . 3x10^-4 . Δl = F . 0,6
12x10^2 Δl = 0,6 F
Δl = 0,6F / 12x10^2
Δl = 5x10^-4F
F = k . Δl atau E.A / l x Δl
F = 12x10^2 Δl / 0,6
= 2000 Δl
tegangan = F / A
= 2000 Δl / 3x10^-4
= 6 666 666 , 667 Δl N/m^2
semoga membantu :) D like