This key facts covers Key Equations and Relationships 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 9 of 16 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 16
Practice
15 questions
Recall
12 flashcards
📋 Key Equations and Relationships
- P = F / A — Pressure equals force divided by area (all students)
- F = P × A — Force equals pressure times area (rearrangement)
- A = F / P — Area equals force divided by pressure (rearrangement)
- P = hρg — Pressure in a liquid (Higher tier only)
- Pressure increases when: force increases OR area decreases
- Pressure decreases when: force decreases OR area increases
- Fluid pressure: acts in all directions, increases with depth, increases with density of fluid
- Atmospheric pressure: decreases with altitude because less air is above
- Upthrust occurs because pressure at the bottom of a submerged object is greater than at the top