What fills the space?

Your choice determines the physics. Objects fall differently depending on what surrounds them.

🌬️

Air

dv/dt = g − k·v² drag force acts

Shape & area matter.
Heavier objects may fall
faster. Terminal velocity
is reachable.

🌑

Vacuum

dv/dt = g no drag, pure freefall

Shape & area irrelevant.
All objects fall identically.
Like Galileo's thought
experiment.

↑ tap a card to begin

Atmospheric Drag Simulator

dv/dt = g − (C_d · ρ · A / 2m) · v²

dv/dt = g − (C_d·ρ·A)/(2m) · v² | drag ∝ C_d · A/m

ρ Air Density (kg/m³)

1.225 🌍 Sea Level

Mars (0.05) 30 km alt (0.41) Mt Everest (0.91) Sea Level (1.225) −500 m (1.60) Dense (2.5)

▲ GROUND LEVEL

● Object 1

BALL

RECT

SHEET

C_d = 0.47

Mass (kg) 5.0

Area (m²) 0.10

C_d · A/m 0.0094

● Object 2

BALL

RECT

SHEET

C_d = 1.28

Mass (kg) 2.0

Area (m²) 0.50

C_d · A/m 0.3200

Live Data

Velocity 1

0.0 m/s

Velocity 2

0.0 m/s

Terminal 1

— m/s

Terminal 2

— m/s

Time 1

—

Time 2

—

Adjust shape & sliders, then DROP ↓

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