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p = 60 cm = 0,6 m
l = 20 cm = 0,2 m
t = 10 cm = 0,1 m
m = 120 kg
g = 10 m/s²
Ditanyakn : P ?
Dijawab :
A = 2 x (pxl + pxt + lxt)
= 2 x (0,6x0,2 + 0,6x0,1 + 0,2x0,1)
= 2 x (0,12 x 0,06 x 0,02)
= 0,000288 m²
= 288x10⁻⁶ m²
jadi Tekanan :
P = F/A
= (mxg)/A
= (120x10)/288x10⁻⁶
= 1.200/288x10⁻⁶
= 4,17x10⁶ Nm²