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Unformatted text preview: • P = ρ gh • P in ocean at 10 m = = 1000.0 kg/m 3 * 9.81 m/sec 2 * 10 m = 9.8*10 4 (kgm/sec 2 )/m 2 • Pascal’s Law • Pressure in a fluid at a point is constant in all directions • Pressure is NOT the same at all depths! 7 Hydraulic Systems P 1 = ? P 1 = F 1 /A 1 P 2 = F 2 /A 2 P 1 = P 2 = F 1 /A 1 = F 2 /A 2 F 2 = F 1 * A 2 /A 1 Force is multiplied by ratio of areas: F 2 > F 1 A 1 * L 1 = A 2 * L 2 Volumes of fluid displace are equal L 2 = L 1 * A 1 /A 2 L 2 < L 1 P 1 P 2 8 Moment, Torque • Force acting at a distance • Moment of force (M) = d * F • M = Sum of all moments 40 ° 10 cm 20 cm 40 N 80 N 9 Work • Force acting over a distance • Use force to push or raise an object • The farther I have to push it  the more work I had to do • W = Force * distance = F * d • Unit = Joule = 1 N * 1 m = 1 Nm 10 Essential Concepts 1) Conservation of mass 2) Force 3) Pressure 4) Hydraulic systems 5) Moment, torque 6) Work...
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 Spring '09
 Saripalli
 Force, Gravitational Force

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