Experiment Mode
Common Controls
Throw Speed (m/s)
14.0
Gravity g (m/s²)
9.80

Air Resistance
Drag Coeff k (kg/s)
0.10
Ball Mass m (kg)
1.0
Terminal vel = 98.0 m/s
F_drag = −k·v  |  a = −g − (k/m)·v
Select Planet
Galileo's Challenge
Drag Coeff k (kg/s)
0.15
Ball Mass m (kg)
1.0
◌ Ghost = vacuum trajectory
● Solid = with air drag
Heavier ball → less drag effect
Select Medium
Ball Radius r (cm)
3.0
Ball Density ρ_ball (kg/m³)
1200
⚠ Ball is less dense than fluid — it will float upward! Increase ball density or choose lighter medium.
Terminal vel = m/s
g_eff = m/s²
Stokes law: F = 6πηrv

Simulation Speed

Collision Results
Collision Time
Collision Height
↓ Dropped Speed
↑ Thrown Speed
☉ Vacuum
BANG!
t0.00 s
● h_drop20.00 m
● h_throw0.00 m
  v_drop0.00 m/s ↓
  v_throw0.00 m/s ↑
Dropped from top
Thrown from bottom
Vacuum — Pure Free Fall
What to Observe
Graph
Data Log
RunModet (s) h_drop (m)h_throw (m) v_drop (m/s)v_throw (m/s)
No data yet — run a simulation!