Short answer: 0 km/h is the speed of standing still; you are not moving relative to the ground. Details
- What 0 km/h means: It represents zero distance traveled per hour, i.e., no motion over time. In physics terms, speed is the rate at which position changes, so at 0 km/h the instantaneous velocity is zero.
- Converting awareness: If you ever hear a speed given in km/h, you can convert to mph by dividing by about 1.609 unless you’re using a precise factor of 1.609344. For example, 0 km/h equals 0 mph. In general, speeds scale linearly with this conversion factor.
- Contexts where 0 km/h appears:
- A vehicle at rest before starting to move.
- A stall or engine-off condition.
- A stationary object in a physics problem.
If you want, I can tailor an explanation for a specific context (e.g., driving, physics homework, or interpreting speedometer readings) and include quick conversion examples.
