Kawat memiliki luas penampang 4 mm2 dan panjang 10 m direngangkan dengan gaya 48 N. jika modulus Young kawat 12 x 10¹⁰ N/m maka pertambahan panjang kawat?
ratara
E=(F/A)/(ΔL/LO) 12X10^10= (48/4X10^-6)/(10/ΔL) = 1X10^-3 M Δl = 1mm
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whongaliem
A = 4 mm² = 4 x 10^-6 m² tegangan = F / A = 48 / (4 x 10^-6) = 12 x 10 ^6 N modulus = tegangan / regangan 12 x 10¹⁰ = 12 x 10 ^6 / regangan regangan = 12 x 10 ^6 / 12 x 10¹⁰ = 10^-4 regangan = Δl / lo 10 ^-4 = Δl / 10 Δl = 10^-4 x 10 Δl = 10^-3 m Δl = 1 mm
12X10^10= (48/4X10^-6)/(10/ΔL)
= 1X10^-3 M
Δl = 1mm
tegangan = F / A
= 48 / (4 x 10^-6)
= 12 x 10 ^6 N
modulus = tegangan / regangan
12 x 10¹⁰ = 12 x 10 ^6 / regangan
regangan = 12 x 10 ^6 / 12 x 10¹⁰
= 10^-4
regangan = Δl / lo
10 ^-4 = Δl / 10
Δl = 10^-4 x 10
Δl = 10^-3 m
Δl = 1 mm