Exit to G3 Physics and O-Level Pressure Hub

Pressure & Hydraulics Explorer

Compare solid pressure, liquid gauge pressure, and hydraulic transfer with readable diagrams, guided reasoning, and misconception-targeted feedback.

SEC G3 Physics 2027

Learning goals

Define pressure as force per unit area
Apply pressure = force ÷ area
Explain pressure transmission in a hydraulic press
Apply density = mass ÷ volume
Apply liquid-column pressure = height × density × gravitational field strength

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Change one variable at a time and watch the model respond.

Mode setup

Core mode

Pressure situation

Contact setup

Applied force180 N

Contact area18 cm²

Fluid controls

Fluid settings

Probe depth in the liquid2.0 m

Liquid density1000 kg m⁻³

Force on the small piston60 N

Small piston area8 cm²

Large piston area48 cm²

Small piston push distance8 cm

Show hints during prediction

Practice run

Choose a mode and checkpoint count when you want scoring.

Run modeGuidedChallengeTest

Run length

Try Pressure Quiz

Choose your checkpoint count for guided or challenge mode.

Study lensDistinguish clearly between force and pressure using p = F / A.12 min activity

Try this

Keep asking one question: what changed here, the force, the area, the depth, or the pressure?

Learn to

Distinguish clearly between force and pressure using p = F / A.
Explain why gauge pressure depends on depth and density, and when points at the same depth have the same pressure.
Use Pascal's principle to explain hydraulic force multiplication together with the distance trade-off.

Exam transfer

Pressure comparison
Liquid pressure
Hydraulics

Governing idea

Solid pressure p = F/A, liquid pressure change Δp = ρgΔh, and an ideal hydraulic system gives Fₒᵤₜ/Fᵢₙ = Aₒᵤₜ/Aᵢₙ.

Model boundary

Liquids are static and incompressible, g = 10 N kg⁻¹, pistons are frictionless, and compared points share the stated surface pressure. Dynamic flow losses are omitted.

Avoid this trap

Pressure and force are not interchangeable. A hydraulic lift multiplies force through a larger area while conserving work in the ideal limit.

How to explore

Compare force and area, track liquid gauge pressure with depth, and explain hydraulic multiplication without energy myths.

Predict the outcome, change one variable at a time, then interpret the result. Completion records participation only and does not award mastery.

About this activity

Compare solid pressure, liquid gauge pressure, and hydraulic transfer with readable diagrams, guided reasoning, and misconception-targeted feedback. A text explanation and no-JavaScript route remain available.

How this activity affects progress

Course and syllabus information

Course: SEC G3 Physics
Edition: SEC G3 Physics 2027