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					1. To determine the density of the liquid, made a
   series of tools like the picture above. P-suckers
   can move freely with cross-sectional area of 1
   cm2. If the spring constant = 100 N / m and the
   spring is depressed as far as 0.4 cm, liquid
   density is ....
   Solution :
   F = k Δx
   F = (100 N/m)(0,4 × 10–2m)
   F = 0,4 N
   Pressure liquid (p):
   p = ρ gh
   p = F/A
   a large liquid pressure which compress the spring, with F = force pressing the spring.
   ρ = F / Agh
   ρ = 0,4 N / (10-4m2) (10 m/s) (1m)
   ρ = 400 kg/m3
2. An elephant has an area of 800 cm2 feet, what is the pressure generated one of the legs
   if the mass of 1500 kg elephant.
   Solution :
   p=F/A
   p = 15000 N / 4(0.8 m2)
   p = 15000 N / 3.2 cm2
   p = 4687.5 N/m2
3. Tabung setinggi 30 cm diisi penuh dengan fluida. Tentukanlah tekanan hidrostatis pada
   dasar tabung, jika g = 10 m/s2 dan tabung berisi:
   a. air
   b. raksa (ρ = 13,6 g/cm3)
   c. gliserin (ρ = 1,26 g/cm3)
   Solution.
   h = 30 cm and g = 10 m/s2.
   a. Hydrostatic pressure at the bottom of the tube containing water:
   Ph = ρ gh = (1.000 kg/m3) (10 m/s2) (0,3 m) = 3.000 N/m2
   b. Hydrostatic pressure at the bottom of the tube containing mercury:
   Ph = ρ gh = (13.600 kg/m3) (10 m/s2) (0,3 m) = 40.800 N/m2
   c. Hydrostatic pressure at the bottom of the tube containing glycerin:
   Ph = ρ gh = (1.260 kg/m3) (10 m/s2) (0,3 m) = 3.780 N/m2
   4.    The picture on the side showing a reservoir filled with
        water. At the bottom of the reservoir wall was leaked to the
        water springing up on the ground. If g = 10 m/s2, determine:
        a. velocity of water that leaks out of parts;
        b. time it takes water to the ground;
        c. Maximum beam distance on the ground is measured from
        the point P.

   Solve.
   Is Know: h1 = 1,8 m, h2 = 5 m, dan g = 10 m/s2.

   a.


   b.
   c. x = vt = (6 m/s) (1 s) = 6 m or

   5. An aircraft moving at a certain speed so that air through the top and bottom of a large
        aircraft wing surface moves with the speed of 50m2 each 320 m / s and 300 m / s. What
        is the amount of lifting force on the wings of these aircraft? (ρ udara = 1,3 kg/m3)

   Is known: A = 50 m2, v2 = 320 m/s, v1 = 300 m/s, and ρ Air = 1,3 kg/m3.


F1-F2 = 403.000 N

				
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