E.g., It's easy to measure both a car's position and velocity due to uncertainties implied by ordinary objects' principle are too small to be observed.
[2.1] Another instance is in a continuous sinusoidal wave, we can know its frequency (how close are each wave), but not its position since it's everywhere on the line.
But it's easy to know a localized wave pulse's location, but not its frequenct as its isolated
[2]
The full rule stipulates that the uncertainties' product in position and velocity is equal to/greater than a tiny physical quantity, or constant (h/(4π), where h is Planck’s constant, ~6.6 × 10−34 J-s). Only for the exceedingly small masses of atoms and subatomic particles does the uncertainties' product become significant.
An attempt to measure precisely a subatomic particle' velocity (e.g., an electron) knocks it unpredictably, so that a simultaneous measurement of its position has no validity, which unrelates to inadequacies in the measuring instruments, method, or observer; it arises out of the intimate connection in nature between particles and waves in subatomic dimensions' realm.