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  2. Kilometres per hour - Wikipedia

    en.wikipedia.org/wiki/Kilometres_per_hour

    The use of SI implicitly required that member states use "km/h" as the shorthand for "kilometres per hour" on official [Note 1] documents. Another EU directive, published in 1975, regulates the layout of speedometers within the European Union, and requires the text "km/h" in all languages, [ 43 ] even where that is not the natural abbreviation ...

  3. Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Knot_(unit)

    The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h ... 1.15078 miles per hour (approximately), 20.25372 inches per ...

  4. List of vehicle speed records - Wikipedia

    en.wikipedia.org/wiki/List_of_vehicle_speed_records

    Uncrewed torpedo speed claims range from 60 knots (110 km/h; 69 mph) for the British Spearfish torpedo [64] to 200 knots (370 km/h; 230 mph) for the Russian VA-111 Shkval. [ 65 ] ^ a b Ground effect vehicles (a.k.a. "Wing-In-Ground effect vehicles") are classified as maritime vessels, rather than aircraft, by the International Maritime ...

  5. Hour record - Wikipedia

    en.wikipedia.org/wiki/Hour_record

    The last women's hour record before the unified rule change was set on 1 October 2003 by Leontien van Moorsel, with a distance of 46.065 km (28.623 mi). In December 2014, it was announced that British Paralympian Sarah Storey would be the first woman to attempt the record following the unified rule change.

  6. League (unit) - Wikipedia

    en.wikipedia.org/wiki/League_(unit)

    Since the Middle Ages, many values have been specified in several countries, ranging from 2.2 km (1.4 mi) to 7.9 km (4.9 mi). It may have originally represented, roughly, the distance a person could walk in an hour .

  7. Orders of magnitude (speed) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

    1 knot (nautical mile per hour) 10 0: 1.2: ... a diving peregrine falcon—fastest bird; 320 km/h or 200 mph is a parameter sometimes used in defining a supercar. ...

  8. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    Pace [6] in minutes per kilometre or mile vs. slope angle resulting from Naismith's rule [7] for basal speeds of 5 and 4 km / h. [n 1]The original Naismith's rule from 1892 says that one should allow one hour per three miles on the map and an additional hour per 2000 feet of ascent.

  9. Speed limit - Wikipedia

    en.wikipedia.org/wiki/Speed_limit

    Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...