What are the sinking and floating conditions of an object? To conclusion!

When the buoyancy experienced by the object is greater than its own gravitational force, the object floats up.

When the buoyant force exerted on the object is equal to its own gravitational force, the object is suspended (can stop anywhere in the water) f float g object: levitation.

When the buoyancy experienced by the object is less than its own gravitational force, the object sinks and floats.

Follow-up: When suspended, don't you consider the downward pressure of the liquid?

Follow-up: Don't just consider a single force, consider the overall effect. The object is subjected to two forces in the water, the upward is buoyant and the downward is gravity, and the two forces are equal, that is, the object is balanced by the force, so it is stationary and suspended.

When you say "the downward pressure of the liquid", you are only a part of the buoyancy.

Follow-up: Isn't the downward pressure the force that pushes it down? It's the opposite direction of buoyancy!

Follow-up: You only say one thing, not the other.

Water has downward pressure on the object (water above the object) and also upward pressure on the object (water below the object).

From p gh, it can be seen that the deeper the pressure, the greater the pressure, of course, it is deeper under the object, so the upward force is greater, how much larger, and the larger part is called buoyancy, so the buoyancy you said has taken into account the "downward pressure of the liquid", and also considered the "upward pressure of the liquid" that you did not consider

Follow-up question: Is the upward and downward pressure of the liquid equal at the same depth?

Follow-up answer: Equal, so the front and back cancellation, left and right cancellation, but the upper and lower depths are different, can not be canceled, the depth below, the big up, the big part is buoyancy.

Follow-up question: I mean, is the pressure of a liquid at the same depth equal to the upper and lower directions?

Follow-up: At the same depth of the liquid, the pressure is equal in all directions.

Follow-up: Can you explain? Why.

Study the floating and sinking conditions of an object.

The floating and sinking conditions of an object are as follows:

1) Force comparison method:

Objects submerged in liquids are subjected to gravity and buoyancy. f floats g, the object floats; f float = g matter, the object is suspended.

(2) Density comparison method:

For an object immersed in a liquid, the rise and fall of the object can be judged by comparing the density of the object and the density of the liquid and the size of the liquid. Liquid, object floating; Liquid < matter, the sinking of the object; Liquid = matter, the object is suspended.

For objects with uneven mass distribution, such as hollow balls, the average density of the object can be found, and the floating and sinking of the object can also be judged by comparing densities.

The float-sink condition refers to the fact that an object immersed in a liquid is subjected to two forces: gravity vertically downward and buoyancy upward, and the magnitude of these two forces determines the state of motion of the object in the liquid.

Objects are rented and floated, sinking and floating conditions and applications.

1. The sinking and floating conditions of the object in the liquid.

It is determined by the buoyancy of the object and the gravity of the body.1 When the F float is greater than the G object, it floats; When f float is equal to g matter, the object is in a floating state (v row is less than v object 0

2) When F float is equal to G matter, suspension (V row is equal to V matter) 3) When F float is small and G matter is, sink (G matter = F float + F support force).

The sinking and floating conditions of the object are as follows:Float and sink condition is a physical term that refers to an object submerged in a liquid that is subjected to two forces: gravity vertically downward and buoyant vertically upward, the magnitude of these two forces determines the state of motion of the object in the liquid.

Depending on the magnitude of the buoyancy and gravity experienced by the object, there are three scenarios for the buoyancy and sinking of the object.

Conditions: Sedimentation: Liquid, GF floating;

Suspension: Matter = liquid, G matter = F float;

Floating: Thing floating: Thing sinking to the bottom:

liquid, g = f float + f the support force of the bottom of the cup on the matter, f float the object submerged in the liquid if its density is less than the density of the liquid, the object floats; If its density is equal to the density of the liquid, the object is suspended; If its density is greater than that of the liquid, the object sinks.