All Questions
Tagged with free-body-diagram fluid-dynamics
19
questions
0
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2
answers
155
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Is there any phenomenon where opposite reaction (Newton's 3rd Law) is not fulfilled?
I'm wondering if there is any case in nature/physics where it has been observed "where there is an action, there is not necessarily an exact equal and opposite reaction".
Or is there some ...
- 193
1
vote
1
answer
57
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Derivation of a formula that connects distance moved by the sphere and the flow rate of water
I am a grade 12 student conducting a physics experiment on Bernoulli's principle and the coanda effect. In the experiment set-up shown here, a sphere made of Styrofoam is suspended in the air next to ...
- 11
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2
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259
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Does buoyancy force depend on the acceleration of the buoyant object?
According to Archimedes' principle, the buoyancy force on a submerged object is given by the product of the mass of the displace fluid and the gravitational acceleration. Effectively, it is determined ...
- 2,712
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98
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Does air in the atmosphere get friction as a planet rotates?
Does air in the atmosphere suffer friction in some way due solely to the planet's rotation? I mean, if you took a rotating planet with an atmosphere (not being influenced or heated by its star, its ...
- 2,462
1
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3
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101
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Reading of weighing machine [closed]
Consider the following situation:
The following ball is released and just after that reading of weighing machine is noted.
Now, it is given that Mass of container is $M$ and mass of liquid is $m$ and ...
- 265
1
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1
answer
73
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Friction forces in an idealized model of hydroplaning
I am reading this question from this text
I am not sure how to write the friction force in terms of the contact area $A$, speed $u$, mass $M$, viscosity $\mu$ and thickness $h$. The friction force as ...
- 113
1
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0
answers
106
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Why is the pressure inside a fluid is equal in all directions? [duplicate]
Actually, I am thinking that the fluid pressure occurs as the result of the forces acting on each molecule from each other. If it is true, then why should the horizontal force be equal to the vertical ...
0
votes
1
answer
477
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Force required to move a liquid through a specified opening
If I know the rate of a liquid, the density of that liquid, the velocity of the liquid, and the size of the opening. How would I calculate the force required (in PSI) to move that liquid through the ...
0
votes
1
answer
218
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Fan in a sealed box
Let's say that there is a helium balloon attached to a large, sealed box. The box is off the ground and there is neutral buoyancy. The box + balloon are simply floating in air, not moving.
Inside the ...
- 31
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0
answers
37
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Sudden upthrust confusion
I've never really thought of this but.... whenever solving problems on upthrust, and drawing the free body force diagrams, we don't include the weight of the water on top of the object(by that I mean ...
2
votes
0
answers
109
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Aerodynamic Problem in regards to a ping pong ball and an open hole tube
I have a ping pong levitation system with a ping pong ball in a tube being pushed by a DC motor fan (shown below) and I'd like to define a relation of the ball's height with the air velocity or ...
- 21
1
vote
1
answer
76
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The Forces Affecting a Sailboat
I've recently read an article about a practical example for " The Forces Affecting a Sailboat " ..
I know the standard formula for the wind force which is : Wind force = Wind pressure * ...
- 11
0
votes
1
answer
617
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Fluid dynamics of an object in motion in a liquid
How does the resultant force acting on an object moving vertically downwards in water compare with the resultant force acting on an object moving upwards in water?
- 63
7
votes
2
answers
1k
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Why did water not drip form this small bottle?
I will explain what I have done and my observations.
I took this bottle and added water into it.
1st time , 25 percent , then 75 percent and then 100 percent of water was filled in the bottle. Yes , ...
- 725
2
votes
1
answer
300
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Can liquids exert/be affected by normal force?
I am doing a problem in which I am drawing free-body diagrams for different objects in a system, and two of the objects which are included in my scenario are Earth and a body of water which is resting ...
- 63