Kinematics Castle: Traffic Light Dash
PREDICT
How this connects to AP Physics 1 (Topics 1.2 and 1.3): during the driver's reaction time the car keeps a constant velocity (d = vt). Then it slows with constant acceleration, and v² = v₀² + 2aΔx gives the braking distance v²/(2a). Double the speed and the braking distance quadruples.