A glass marble
Buoyant force.
Gravity is pulling down, and Buoyancy is pushing up. When the force of gravity is greater than the buoyant force, objects sink. When the buoyant force is greater than the force of gravity, objects float.
As buoyant force decreases then the body starts sinking down.
heavy; weighted; sinking
Buoyant force is entirely the result of gravity. In a gravitational field, we find denser objects sinking in whatever medium they are in (usually air or water) and less dense objects, if the density is lower than the surrounding medium, floating. In the absence of a gravitational field (or in free fall, which is equivalent) everything floats.
It will if it occupies space where liquid should be.
Normally you can assume that the density of the liquid won't change much; nor the density of the sinking object. Therefore, the buyant force won't change significantly.
they are neutrally buoyant. they have ballast tanks to achieve this
AAt
AAt
I think it is Buoyancy. Buoyant floats, neutral buoyancy neither floats nor sinks it is the same SG as the liquid in which it sits. Negative buoyancy sinks. Complete guesswork I'm afraid but there you go.
The bouyant force acts in an upward direction against gravity. It keeps things from sinking.