Is it correct that spherical buoy doesn't rotate?(Buoyancy)

In summary, a spherical buoy does not rotate due to its design to remain in a fixed position on water. Buoyancy, which is the upward force exerted on an object when submerged in a fluid, prevents rotation by acting in a vertical direction. Even if the buoy is not perfectly spherical, it will still not rotate as long as it is round and symmetrical. The buoyancy of a spherical buoy is affected by its shape, size, and the density of the fluid it is submerged in. Finally, a spherical buoy will not rotate if it is not fully submerged, as the buoyancy force acts on the entire submerged portion of the buoy.
  • #1
kevin_tee
80
2
Does spherical buoy doesn't rotate when subject to wave compare to rectangular buoy? If only buoyancy is taken into account only. Here is the picture I draw trying to explain.

My reason is that the water that is touching the spherical buoy experience the same geometry on any surface of the sphere.
 

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  • #2
kevin_tee said:
If only buoyancy is taken into account only.
Buoyancy is due to pressure forces which act perpendicular to the sphere's surface, and thus don't create any torque around it's center of mass.
 

1. Is it true that a spherical buoy does not rotate?

Yes, it is correct that a spherical buoy does not rotate. This is because a buoy is designed to float on water and remain in a fixed position, so it does not need to rotate.

2. How does buoyancy affect the rotation of a spherical buoy?

Buoyancy is the upward force exerted on an object when it is submerged in a fluid, such as water. In the case of a spherical buoy, the buoyancy force acts in a vertical direction, keeping the buoy in a fixed position and preventing it from rotating.

3. Can a spherical buoy rotate if it is not perfectly spherical?

No, a spherical buoy will still not rotate even if it is not perfectly spherical. As long as the buoy is round and symmetrical, the buoyancy force will still act in a vertical direction and prevent rotation.

4. What factors can affect the buoyancy of a spherical buoy?

The buoyancy of a spherical buoy is affected by several factors, including its shape, size, and the density of the fluid it is submerged in. The buoyancy force will increase with the volume of the buoy and decrease with the density of the fluid.

5. Can a spherical buoy rotate if it is not fully submerged?

No, a spherical buoy will not rotate if it is not fully submerged in a fluid. The buoyancy force acts on the entire submerged portion of the buoy, so if it is not fully submerged, there will be no net torque to cause rotation.

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