IPA FISIKA : Konsep Fisika pada Kapal Selam (Prinsip Cara Kerja)

Summary

This video explains how submarines use Archimedes' principle to control their buoyancy, allowing them to dive and surface with ease. Submarines achieve this by filling or emptying ballast tanks, adjusting the amount of water inside to alter their weight. When the tanks are filled with water, the submarine becomes denser than the surrounding water, causing it to sink. Conversely, when air is pumped into the tanks, the submarine becomes buoyant and rises to the surface. The process is guided by the principle that an object floats when the upward force equals its weight.

Takeaways

• 😀 Submarines use Archimedes' principle to control their buoyancy and submersion in water.
• 😀 Ballast tanks and air pumps help submarines easily dive, float, or maintain a desired depth.
• 😀 To dive, submarines fill their ballast tanks with water, increasing their weight and causing them to sink.
• 😀 When a submarine wants to submerge, it opens water valves to fill ballast tanks and closes air valves.
• 😀 The submarine sinks when the upward buoyant force is less than the weight of the submarine.
• 😀 To rise, submarines pump air into ballast tanks, displacing water, and making the submarine lighter.
• 😀 When a submarine is rising, the water in its ballast tanks is replaced with air to reduce weight.
• 😀 The principle of floating occurs when the upward buoyant force equals the weight of the object.
• 😀 The submarine's ballast tanks act as flotation devices, similar to buoyancy tanks on other vessels.
• 😀 Archimedes' law explains the fundamental physics behind why submarines can submerge and surface effectively.
• 😀 Submarines rely on the balance between air and water in their ballast tanks to control their movement underwater.

Q & A

What principle allows a submarine to sink, float, and hover in water?

A submarine operates based on Archimedes' principle, which states that an object will float or sink in a fluid depending on the balance between the buoyant force and the object's weight.

How does a submarine sink when it needs to dive?

To dive, a submarine opens the water valve to fill its ballast tanks with water, making it heavier than the surrounding water, causing it to sink.

What happens when a submarine wants to resurface?

When a submarine wants to resurface, it closes the water valve and opens the air valve, pumping out water from the ballast tanks and allowing the submarine to rise back to the surface.

What is the role of the ballast tanks in a submarine?

The ballast tanks in a submarine are filled with water or air to adjust the submarine's weight. This allows the submarine to either sink or float based on the amount of water or air in the tanks.

What does Archimedes' principle say about floating and sinking objects?

Archimedes' principle states that an object will float when the buoyant force (the upward force exerted by the fluid) equals the weight of the object, and it will sink when the buoyant force is less than the weight of the object.

Why does a submarine become heavier when it wants to dive?

A submarine becomes heavier when it fills its ballast tanks with water because the added water increases its weight, making it denser than the surrounding water, causing it to sink.

What is the purpose of the air in the submarine's ballast tanks?

The air in the ballast tanks serves as a buoyant force when the tanks are filled with air. This helps the submarine rise to the surface by reducing its overall weight when the water in the ballast tanks is pumped out.

How does the submarine maintain buoyancy when floating?

The submarine maintains buoyancy when floating by adjusting the amount of air and water in the ballast tanks. When the water is pumped out and replaced with air, the submarine becomes lighter and floats.

What is the relationship between the weight of the submarine and the surrounding water when the submarine is submerged?

When a submarine is submerged, its weight must be greater than the buoyant force exerted by the surrounding water for it to sink. This is achieved by filling the ballast tanks with water.

What happens to the buoyant force when the submarine is filled with air in its ballast tanks?

When the submarine's ballast tanks are filled with air, the buoyant force increases, causing the submarine to become lighter and enabling it to float or rise back to the surface.