Calculating the Center of Mass & Force of Water on Half-Cylinder

Click For Summary
The center of mass of the solid half-cylinder is located at its geometric center due to its constant density. The discussion also addresses the force exerted by water on the lateral circular face of the half-cylinder, which is a challenging concept for some participants. Clarification is sought regarding the definition of a "lateral circular face" and the expectations for problem-solving contributions. There is a sense of frustration over the perceived lack of assistance in understanding the calculations involved. Overall, the thread highlights the need for clearer explanations and support in tackling physics problems related to fluid dynamics.
IntegrateMe
Messages
214
Reaction score
1
A solid half-cylinder of radius 1 meters and length of 5 meters lies under 50 meters of
water at the bottom of a lake. The cylinder is made of a material of constant density d.

1. Find the center of mass.

I said that the COM will be in the center because there is a constant density.

2. What is the force exerted by the water on one of the lateral circular faces of the half
cylinder?

I'm having trouble understanding this part of the question. What exactly is a "lateral circular face?"
 
Physics news on Phys.org
Is there a reason why no one is helping me? Is it because I haven't "shown enough work" on a problem I don't know how to solve or even start?
 
Anyone?
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations
  • · Replies 15 ·
Replies
15
Views
576
A cylinder connected to a hanging mass
  • · Replies 21 ·
Replies
21
Views
1K
Find the center of gravity of a combined cone and cylinder
  • · Replies 7 ·
Replies
7
Views
2K
Center of mass and momentum- A question about systems
  • · Replies 25 ·
Replies
25
Views
1K
Distribution of Energy when work is done on a system of 2 masses connected by a spring
  • · Replies 17 ·
Replies
17
Views
2K
What is the magnitude of the acceleration of cylinder's com?
  • · Replies 4 ·
Replies
4
Views
2K
Where is my mistake? (Pure rolling and center of mass)
  • · Replies 8 ·
Replies
8
Views
2K
Center of Mass of open top cylinder
  • · Replies 9 ·
Replies
9
Views
5K
How Does Adding Masses Affect the Angular Velocity of a Rotating Cylinder?
  • · Replies 12 ·
Replies
12
Views
3K
What are the forces on the center of mass?
  • · Replies 7 ·
Replies
7
Views
3K