Force on a sphere in flowing water and velocity of water

AI Thread Summary
The discussion revolves around calculating the forces acting on a sphere submerged in flowing water, specifically focusing on gravity and buoyancy. The user has derived the mass of the sphere based on fluid density and gravitational force but is uncertain about the next steps in their calculations. They question whether drag force is relevant given the sphere's minimal movement through the water, despite viscosity being provided in the problem. The conversation seeks clarification on the correct approach to analyze the forces and the impact of water flow on the sphere. Understanding these dynamics is crucial for accurately solving the problem.
come2ershad
Messages
16
Reaction score
0

Homework Statement



The problem has been attached with this post.

Homework Equations



Equation given below.

The Attempt at a Solution



The forces on the sphere could be due to gravity and the buoyancy force.
((pi*d^3)/6)×ρ(water)×g=mg
From this I can find the mass of the sphere in terms of the density of fluid.
Then Fv = m (dv/dt). But, I am stuck here. How should I proceed? Is my approach correct?
 

Attachments

  • 1th.jpg
    1th.jpg
    45.7 KB · Views: 525
Last edited:
Physics news on Phys.org
Also, though viscosity of water is given in the problem, i doubt if there would be any drag force on the sphere since the sphere doesn't seem to be moving significantly through the water. Please throw some light on this concept too.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Formula derivation connecting vertical water flowrate & horizontal distance moved by a suspended sphere
5
Replies
207
Views
9K
How does the density of water affect a sphere dipped in it?
Replies
21
Views
2K
What is the thickness of the wall of a hollow iron sphere submerged in water?
Replies
3
Views
2K
Find Time to Reach Top of Beaker (10 cm)
Replies
16
Views
2K
Oscillation of free surface of water in parallelepiped container
Replies
13
Views
2K
Drag force on a descending sphere
Replies
6
Views
2K
Inverse square law of gravitation and force between two spheres
Replies
8
Views
2K
How to calculate the velocity of water streaming into the boat?
Replies
19
Views
999
Wooden sphere rolling on a double metal track
2
Replies
97
Views
5K
A hollow sphere sinks some fraction f in water...
Replies
16
Views
2K

Hot Threads

Recent Insights

Back
Top