AddForce vs AddImpulse — 2D Motion Sandbox

Unity-ish FixedUpdate simulation • continuous forces vs instant impulses • trajectory + graphs
Mode: Semi-Implicit Euler (Unity-ish)
Steps: — t: — pos: — vel: —
Events
Type t0 t1 X Y Mode
Import / Export events (JSON)

Unity mapping (simplified):
• AddForce (Force): Δv = (F / m) · dt each fixed step while active.
• AddForce (Acceleration): Δv = a · dt (ignores mass).
• AddImpulse (Impulse): Δv = (J / m) applied instantly at time t.
• AddImpulse (VelocityChange): Δv = Δv directly (ignores mass).
No collisions/rotation; optional linear drag is a simple damping.

World View (trajectory + playback)
Mouse: drag to pan • Wheel: zoom • Simulation uses meters. Axes are drawn through (0,0).
Graphs
Graphs: x(t), y(t), speed(t). Click legend to toggle series.