Topic · 3 games

Fluids in motion: flow and Bernoulli's principle

Moving fluids trade pressure for speed. The same volume passes every part of a pipe each second, and along a flow pressure, motion, and height always add up to the same total: A·v = constant, p + ½·ρ·v² + ρ·g·h = constant.

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3 games

PLAY NOW · 52

Leaky Tank: How Far Does the Jet Go?

Water deeper in a tank spurts out faster: v = √(2·g·h). Predict a jet's speed and landing spot, fill a bucket, and find the two holes that land together and the hole that shoots farthest.

Bernoulli's principleTorricelli's law
Play Leaky Tank
Jet speed
v = √(2·g·h)
Landing distance
x = 2·√(h·y)

PLAY NOW · 53

Venturi Pipe: Faster Water, Lower Pressure

Where a pipe narrows, water speeds up and its pressure drops. Predict a nozzle's jet, the drop in a narrow pipe, the columns of a Venturi meter, the flow it measures, and a fountain's height.

Bernoulli's principleContinuity
Play Venturi Pipe
Continuity
A₁·v₁ = A₂·v₂
Bernoulli
Δp = ½·ρ·(v₂² − v₁²)

PLAY NOW · 54

Storm and Wing: Fast Air Pulls Up

Fast air has lower pressure. Predict the pull of a storm on a roof and the wind that tears it off, the lift on a wing, a plane's take-off speed, and the breath that raises a paper strip.

Bernoulli's principleLift
Play Storm and Wing
Pressure difference
Δp = ½·ρ·(v_over² − v_under²)
Lift
F = Δp·A

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