University Physics Volume 1 — Mechanics · Problem 33
Units and Measurement — OpenStax
Physics — University · unit-conversion
Problem
In SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you're probably more comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical intuition. More precisely, show that (a) 1.0 m/s=3.6 km/h and (b) 1.0 m/s=2.2 mi/h.