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FLUID MECHANICS EXAMS WITH ANSWERS, Exams of Fluid Mechanics

Isabela State University (ISU)Fluid Mechanics

An exams on fluid mechanics questions with answers.

Typology: Exams

2021/2022

Available from 11/07/2022

VirgilioIgnacioJr
VirgilioIgnacioJr 🇵🇭

34 documents

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Republic of the Philippines
ISABELA STATE UNIVERSITY
Cauayan City Campus
COLLEGE OF EDUCATION
Fluid Mechanics Final Exam
Name: IGNACIO, VIRGILIO N, JR Course/Year Section: BSED 3 SCIENC E
1. Water Balloon
The absence of water inside the balloon space results in a net upward force called
buoyancy, which propels the balloon upward. The buoyant force equals the weight of
the water that the balloon displaces. The net force acting on the balloon is directed
upward. The net force is greater than zero. In equation form, Net force = buoyant
force of the water + weight of the filled balloon > 0 directed upward. The details of
the solution has to deal with the product of the volume of the balloon times the
density of air times the acceleration due to gravity is the downward force called
weight. The product of volume of the displaced water times the density of the water
times the acceleration due to gravity is the buoyant force of the water directed
upwards.
In symbols, if the BF > W, then the balloon rises upward. If BF = W then the balloon
will stay where it was first located neither rising nor falling and if BF < W then the
balloon will sink downward. Note that BF is the buoyant force of the water, W is the
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ISABELA STATE UNIVERSITY

Cauayan City Campus COLLEGE OF EDUCATION Fluid Mechanics Final Exam Name: IGNACIO, VIRGILIO N, JR Course/Year Section: BSED 3 SCIENCE

  1. Water Balloon The absence of water inside the balloon space results in a net upward force called buoyancy, which propels the balloon upward. The buoyant force equals the weight of the water that the balloon displaces. The net force acting on the balloon is directed upward. The net force is greater than zero. In equation form, Net force = buoyant force of the water + weight of the filled balloon > 0 directed upward. The details of the solution has to deal with the product of the volume of the balloon times the density of air times the acceleration due to gravity is the downward force called weight. The product of volume of the displaced water times the density of the water times the acceleration due to gravity is the buoyant force of the water directed upwards. In symbols, if the BF > W, then the balloon rises upward. If BF = W then the balloon will stay where it was first located neither rising nor falling and if BF < W then the balloon will sink downward. Note that BF is the buoyant force of the water, W is the

ISABELA STATE UNIVERSITY

Cauayan City Campus COLLEGE OF EDUCATION weight of the balloon and air.

  1. Opposite direction of a tree Tropical cyclones are compact, circular storms, generally some 320 km (200 miles) in diameter, whose winds swirl around a central region of low atmospheric pressure. The winds are driven by this low-pressure core and by the rotation of Earth, which deflects the path of the wind through a phenomenon known as the Coriolis force. As a result, tropical cyclones rotate in a counterclockwise (or cyclonic) direction in the Northern Hemisphere and in a clockwise (or anticyclonic) direction in the Southern Hemisphere. The wind in this photo is obviously circulating that is why the tree went the opposite side.

ISABELA STATE UNIVERSITY

Cauayan City Campus COLLEGE OF EDUCATION

  1. Kite. A kite flies because the wind pushes it The wind exerts a force on the kite. You can feel this force when you stand with the kite in the wind. The wind pushes the kite (and you). The force can be so strong that you find it difficult to stand still. The wind will blow you away. The wind also pushes the kite when it flies. It cannot blow the kite away as the kite is tied to the string. But the wind can blow the kite up into the air because the kite is at a slight angle to the wind.

ISABELA STATE UNIVERSITY

Cauayan City Campus COLLEGE OF EDUCATION

  1. Mosquito float in water. Mosquitoes take advantage of a property called surface tension to stay above the water and not sink. The force they exert downward is less than the forces exerted among the water molecules on the surface of the water, so the insect does not penetrate beneath the surface of the water.
  2. Ice float in water Ice floats on water because it is less dense than water. Ice and water are both made of the same element H2O, otherwise known as Hydrogen Dioxide. At sufficiently cold temperatures, usually around 0 degrees Celsius (32 degrees Fahrenheit), water undergoes a phase transition to ice called freezing. This is because as the temperature becomes colder, the water molecules lose energy and move less.