THE DIGITAL TEST TRACK / SIMULATION
Ready. Predict.
Let it roll.
Find the finish line before the car does. Change the speed, switch the texture, and discover what stops it.
Make your first prediction.
Make your best prediction.
Set your launch and texture, mark your guess, then release. Aim for 100 points.
The test track
READYExplore more experiments
WHAT TO TRY
Same launch. Different road.
Keep the speed or ramp height fixed and compare all three surfaces. Which takes away motion fastest?
Adds nine calculated simulation trials using your current launch setup. Identical setups give identical results.
YOUR NEXT CHALLENGE
Double the speed.
Keep the surface the same. Predict what happens to the stopping distance when the starting speed doubles.
Beat the Brakes · Simulation report
Illustrative constant-resistance model. μ: smooth 0.08, felt 0.18, sandpaper 0.30. Ramp efficiency 80%. Mixed sections change resistance along the road. These are simulated results, not measurements of the physical kit.
03 / THE EVIDENCE
Every run tells a story.
Mean stopping distance by surface
Single-surface trials filtered to the current launch setup. Mixed tracks appear in the history and speed graph.
Speed over time
The latest completed run. Steeper lines mean faster deceleration. Mixed-track lines change slope between textures.
| Run | Surface | Launch | Speed (m/s) | Stop (m) | Time (s) | Prediction (m) | Score |
|---|
Simulation trials save in this browser. Your real measurements stay in the Real results tab.
Simulation report notes
How this simulation works
This is a simplified learning model, not a prediction of your physical kit. On the flat track, constant deceleration is a = μ × 9.81, and stopping distance is v² / (2a). Illustrative effective resistance coefficients: smooth 0.08, felt 0.18, sandpaper 0.30. These are model choices, not measured material values.
Ramp mode assumes 80% of gravitational potential energy becomes translational motion: v = √(2 × 9.81 × height × 0.8). It ignores detailed wheel rotation, bumps, air drag and changing resistance. Time starts at the ramp exit. Prediction scores range from 0 to 100 based on relative distance error. Test the real kit to find its actual surface order.