University Physics Volume 1 — Mechanics · Problem 74
Units and Measurement — OpenStax
Physics — University · significant-figures
Problem
(a) If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h, what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60 km/h, what is the range of speeds you could be going?