# basic hydraulics pressure and force math for water technology mth 082 lecture 5 hydraulics chapter 2...

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• Slide 1
• Basic Hydraulics Pressure and Force Math for Water Technology MTH 082 Lecture 5 Hydraulics Chapter 2 (pgs. 213-224) Math for Water Technology MTH 082 Lecture 5 Hydraulics Chapter 2 (pgs. 213-224)
• Slide 2
• Pressure
• Slide 3
• What is Pressure and Force? Flow of water in a system is dependant on the amount of force causing the water to move. Force= pressure X area Pressure is the amount of force acting (pushing) on a unit area. Units of pressure = psi (pounds per square inch) Units of pressure = kPa (kilopascals) Flow of water in a system is dependant on the amount of force causing the water to move. Force= pressure X area Pressure is the amount of force acting (pushing) on a unit area. Units of pressure = psi (pounds per square inch) Units of pressure = kPa (kilopascals) In the water industry we deal with pressure exerted by water or the height of water In the water industry we deal with pressure exerted by water or the height of water
• Slide 4
• Pressure =Water Height A container that is 1 ft by 1 ft by 1 ft (a cubic foot container) is filled with water. What is the pressure on the square foot bottom of the container. Water density = 62.4 lb/ft 2 Convert = 62.4 lb/ft 2 = 62.4 lb/ (1 ft) (1 ft) = 62.4 lb/(12 in) (12 in) = 62.4 lb/(144 in 2 ) = 0.433 lb/in 2 = 0.433 psi Convert = 62.4 lb/ft 2 = 62.4 lb/ (1 ft) (1 ft) = 62.4 lb/(12 in) (12 in) = 62.4 lb/(144 in 2 ) = 0.433 lb/in 2 = 0.433 psi A foot high column of water over a square inch surface area weighs 0.433 lb which equals 0.433 psi. ***Thus, 0.433 converts pressure from feet of water to pressure in pounds per square inch. ***** A foot high column of water over a square inch surface area weighs 0.433 lb which equals 0.433 psi. ***Thus, 0.433 converts pressure from feet of water to pressure in pounds per square inch. ***** 1 ft 0.433 lb of water
• Slide 5
• The pressure exerted by a column of water one inch square when at rest, is the _________ pressure. It is usually measured in psi. 1.Static 2.Dynamic 3.Theoretical 4.Practical 1.Static 2.Dynamic 3.Theoretical 4.Practical
• Slide 6
• A pound of water weighs ______lbs. 1.1 2.7.48 3.8.34 4.62.4 1.1 2.7.48 3.8.34 4.62.4
• Slide 7

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