1
SOLUCIONES / EJERCICIOS DE PRENSAS HIDRÁULICAS PARA PRACTICAR
1.
10000 · 5 · x = x · Fg
50000 · x = x · Fg
Fg = 50000 N
2.
m = 1600 kg / Fg = m · g = 1600 · 9.8 = 15680 N
Sg = 10 m2
Sp = 200 cm2 → 0.02 m2
10 · Fp = 0.02 · 15680
10 · Fp = 313.6
Fp = 31.36 N
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3.
rp = 10 cm → 0.1 m / Sp = π · 0.12 = 0.0314 m2
Fp = 30 N
Fg = 270 N
rg = ?
30 · Sg = 270 · 0.0314
30 · Sg = 8.478
Sg = 0.2826 m2
Sg = π · r2
0.2826 = π · r2
√
r = 0.3 m
4.
Fg = 8000 N
Fp = 20 N
Sg / Sp = ?
3
5.
rp = 5 cm → 0.05 m / Sp = π · r2 = π · 0.052 = 7.85 · 10-3 m2
rg = 50 cm → 0.5 m / Sg = π · r2 = π · 0.52 = 0.785 m2
Fg = ?
Fp = 10 N
10 · 0.785 = Fg · 7.85 · 10-3
7.85 = Fg · 7.85 · 10-3
Fg = 1000 N
6.
Fp = ?
Fg = 18000 N
4
30 · Fp = 18000
Fp = 600 N
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