20 kilometres per hour
5.556 m/sSpeed · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Speed
Just how fast is 20 kilometres per hour?
On foot
20 km/h
DISTANCE IN ONE SECOND
20 kilometres per hour
The quantity is exact as entered.
5.556 m/sSpeed
0
5.556 m in 1 s
Pedal-powered rail trolley
A pedal-powered rail trolley is a lightweight vehicle propelled by pedalling, designed to travel along railway tracks for recreation or transport.
5 m/sDefined operating speed
0
5 m in 1 s
Each track shows distance covered in the same second. The small illustrations identify the movers; their sizes are schematic.
A little perspective
20 kilometres per hour is about 1.11 times the operating speed of a pedal-powered rail trolley.
Measurements, assumptions & sources +
20 kilometres per hour
Speed: 5.556 m/s; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Pedal-powered rail trolley
Defined operating speed: 5 m/s; defined specimen; range 3 m/s–7 m/s.
A defined four-seat pedal rail trolley 2.4 m long, 250 kg ready to ride and travelling at 5 m/s. Commercial rail bikes differ; length excludes couplers and the mass excludes riders.
The marked defined operating speed is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 20 kilometres per hour with the operating speed of a pedal-powered rail trolley. The notes below explain how each value was chosen.
Pedal-powered rail trolley
5 m/sDefined operating speed · defined specimen · range 3 m/s–7 m/s
A defined four-seat pedal rail trolley 2.4 m long, 250 kg ready to ride and travelling at 5 m/s. Commercial rail bikes differ; length excludes couplers and the mass excludes riders.
- Comparing
- Speed ↔ Defined operating speed
- Relative size
- 20 kilometres per hour is about 1.11 times the operating speed of a pedal-powered rail trolley. 20 kilometres per hour is approximately 11.1% greater than the operating speed of a pedal-powered rail trolley.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- We use 5 m/s for the operating speed of a pedal-powered rail trolley; the recorded range is 3 m/s–7 m/s.
- The operating speed of a pedal-powered rail trolley: This is an illustrative comparison value, not a claim that every example is the same.
- The recorded ranges overlap, so the ordering can vary even though the central values differ.
Speed is distance per unit time; it does not specify the total distance travelled.
5.5556 m/smetres per second
12.427 mphmiles per hour
Mach 0.016197Mach
1.8531 × 10⁻⁶% of c (1.8531 × 10⁻⁸c)speed of light
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