Physics · KS3 Y8 · Forces & Motion

Pressure in liquids

Pressure in liquidsFree6:11Heddy Score 3 of 7, below the standard

What you need to know

  • The pressure at the bottom of a liquid comes from the weight of the liquid above it.
  • Pressure due to a liquid = height (depth) × density × g, so it rises the deeper you go.
  • Water has a density of 1000 kg/m³; a denser liquid gives a bigger pressure at the same depth.
  • Worked examples show the pressure under 6 m of water is about 58 800 Pa.

In this clip

Runs 6:11, from 4:29 to 10:40 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

998K views · 13.4K likes · The Organic Chemistry Tutor 11.1M subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

Step-by-step worked examples of pressure = force ÷ area and of pressure increasing with depth in a liquid.

The Organic Chemistry Tutor on YouTubechecked 2026-10-22

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