This memory aid covers Memory Aids within Pressure for GCSE Physics. Revise Pressure in Forces for GCSE Physics with 15 exam-style questions and 12 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 12 of 16 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.
Topic position
Section 12 of 16
Practice
15 questions
Recall
12 flashcards
🧠 Memory Aids
The Pressure Triangle
Draw a triangle with P at the top, F on the bottom-left, and A on the bottom-right. Cover what you want to find:
- Cover P: F over A → P = F / A
- Cover F: P times A → F = P × A
- Cover A: F over P → A = F / P
Remembering the units
"1 Pa = 1 N on 1 m²" — one Pascal is one Newton of force spread over one square metre. The unit name honours Blaise Pascal, the 17th-century French mathematician who studied fluid pressure.
P = hρg — "Here Rho Goes"
The letters in P = hρg can be remembered as Here Rho Goes (h, ρ, g) — depth times density times gravity. The word "rho" (ρ) is the Greek letter for density.
Atmospheric pressure and altitude
"Higher up = less air above = lower pressure." Think of it as a pile of air pressing down on you. The higher you climb, the less of the pile is above your head.