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regangan = Δx/x = 0,0001/3 = 0,000033
modulus young =tegangan/regangan = 25000000 / 0,000033 = 750000750000,75
F = 20 N
L = 3 m
A = 0,0000008 m²
ΔL = 0,1 mm = 0,0001 m
Dit :
Tegangan (T) = .............?
Regangan (R) = .............?
Modulus Elastis (M) = ......?
Penyelesaian :
a)Tegangan
T = F/A
T = 20/0,0000008
T = 25000000
T = 2,5 x 10⁷ N/m
b) Regangan
R = ΔL/L
R = 0,0001/3
R = 0,000033
R = 3,33 x 10⁻⁵
c) Modulus Elastis
M = T/R
M = 2,5 x 10⁷/ 3,33 x 10⁻⁵
M = 7,5 x 10¹¹ N/m
Ok?