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kp = k1 + k2
= 60 + 60
= 120 N/m
Kp dan k3 disusun seri, nilai k total
1/kt = 1/kp + 1/k3
= 1/120 + 1/60
= 1/120 + 2/120
= 3/120
kt = 40 N/m
Δx = F/kt
= mg/kt
= 1,8 x 10/40
= 0,45 m
(gak ada jawaban)
kp= k1 + k2 = 60 + 60 = 120
k3 seri dengan kp maka
1/ks = 1/kp + 1/k3
1/ks = 1/120 + 1/60
1/ks = 3/120
ks = 120/3
ks = 40 N/m
m = 1,8 kg
g = 10 m/s2
F = w = m x g =1,8 x 10 =18 N
x = F/ks = w/ks = 18 / 40 = 0,45 m
munkin ada kekeliruan
jadi pertambahan panjanggnya 0,45 meter