A 60 g car rolls down the ramp. The timer starts the instant it reaches the bottom, then records a split time as the car passes each distance mark. Run all four surfaces and compare.
Copy these numbers onto your data sheet. Times are in seconds.
No runs recorded yet.
Travel time versus distance for each surface.
Model: the car leaves the ramp with speed v = √(2gh × 0.88) — the 0.88 accounts for friction on the ramp itself. On the flat surface it slows at a = μg, so distance d is covered in t = (v − √(v² − 2ad)) / a. Coefficients μ are typical values for a rolling toy car and are listed with each surface.