Projectile motion simulation

pen it on any device — phone or desktop — and try this: drag the angle slider back and forth and watch the predicted dashed arc reshape instantly, before you even press Play. A few things worth knowing about how it works:

Telemetry split : the dark readout panel separates "right now" values (amber: time, position, velocity components) from "full flight" computed values (teal: range, max height, total flight time) — so you can always tell whether a number describes the current instant or the whole trajectory. Gravity presets : Earth/Mars/Moon/Jupiter chips next to the gravity slider let you instantly compare how the same launch looks on different worlds. Velocity vector : the teal arrow on the projectile shows real-time direction and magnitude, shrinking to zero at the apex and flipping below the horizontal axis on the way down — a nice visual for "vy = 0 at peak." Adjusting any setup slider auto-resets the shot to the launch point (so you see the new path cleanly) — Play then animates it.