How does a submarine stay underwater without sinking to the bottom, and what keeps it balanced? This educational explainer breaks down the physics and engineering with clear examples anyone can follow.

Name: How does a submarine stay underwater without sinking to the bottom, and what keeps it balanced? This educational explainer breaks down the physics and engineering with clear examples anyone can follow.
Uploaded: 2026-09-25
Duration: 3 min 59 s
Channel: Gnyasha
Description: A submarine holds steady at 200 metres. Its weight pulls down with 3,000 tonnes; its buoyancy pushes up with 3,000 tonnes — exactly equal. Control surfaces trim that balance. So how does it stay level, neither rising nor sinking? Like a basket that weighs exactly what the trolley can carry.

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A submarine holds steady at 200 metres. Its weight pulls down with 3,000 tonnes; its buoyancy pushes up with 3,000 tonnes — exactly equal. Control surfaces trim that balance. So how does it stay level, neither rising nor sinking? Like a basket that weighs exactly what the trolley can carry.

Chapters 9

0:00 Why this is worth understanding 0:21 The shape of it 0:50 How it works, step by step (part 1)1:36 How it works, step by step (part 2)2:29 The part that matters most 2:39 Example 1 2:58 Example 2 3:18 Example 3 3:37 Recap

Animated by Proverbit, planned with AI · Pictures: Submarine control surfaces2.svg — en:User:XLerate, adapted, CC BY-SA 3.0