Velocity
Velocity is a vector quantity that specifies the time rate of change of displacement with respect to a reference frame. If the reference frame is not inertial, the velocity is often designated "relative velocity".
| 1 mph | = | 1.609 km/h | 1 ms-1 | = | 3.2808399 fts-1 | |
| 1 in s-1 | = | 0.0254 ms-1 | 1 ft s-1 | = | 0.3048 ms-1 | |
| 1 km h-1 | = | 0.2778 ms-1 | 1 ft min-1 | = | 0.00508 ms-1 | |
| 1 knot | = | 0.5144 ms-1 |
1km h-1 = 1 km/h = 1000 m/h = 1000/3600 m/s = 0.2778m/s
Note: if using this type of conversion within a calculation then best to use 1000/3600 in the calculation rather than the value round to 4 decimal points.
| Snail | 0.013 ms-1 |
| Fast walk | 1.79 ms-1 (4 mph) |
| Stephenson′s Rocket | 13.4 ms-1 (30 mph) |
| Steam train speed record | 56.3 ms-1 (126 mph) |
| Fastest boat (Spirit of Australia 1978) | 141.95 ms-1 (317.6 mph) |
| Land speed record (Thrust SSC 1997) | 341.0 ms-1 (763 mph) |
| Concorde | 597 ms-1 (1336 mph) |
| Fastest plane (SR71 BlackBird) | 980 ms-1 (2193 mph) |
| Escape velocity at surface of the Moon | 2.38x103 ms-1 |
| Escape velocity at surface of the Earth | 1.12x104 ms-1 |
| Escape velocity at surface of the Sun | 6.18x105 ms-1 |
| Speed of light in vacuo | 2.998x108 ms-1 |
Acknowledgement
We would like to thank Peter W Kruhøffer for pointing out the error in our conversion table from km h-1 to ms-1
See also: Acceleration, Angular Velocity, Escape Velocity, Hypervelocity, Instantaneous Speed, Kilometres Per Hour, Length, Miles Per Hour, SI Units.
Subjects: Classical Mechanics