how fast is 1 knot?

Answer 1

Units of speed include:

* metres per second, (symbol m/s), the SI derived unit
* kilometres per hour, (symbol km/h)
* miles per hour, (symbol mph)
* knots (nautical miles per hour, symbol kt)
* Mach, where Mach 1 is the speed of sound; Mach n is n times as fast.

Mach 1 ≈ 343 m/s ≈ 1235 km/h ≈ 768 mi/h (see the speed of sound for more detail)

* speed of light in vacuum (symbol c) is one of the natural units

c = 299,792,458 m/s

* [other important conversions]

1 m/s = 3.6 km/h
1 mph = 1.609 km/h
1 knot = 1.852 km/h = 0.514 m/s

Vehicles often have a speedometer to measure the speed.

Objects that move horizontally as well as vertically (such as aircraft) distinguish forward speed and climbing speed.

Answer 2

Arrr me lad, but no one's mentioned where the word "knot" came from. Having spent me whole bloomin' life in Uncle Sam's navy, I happen ter know.

Back in olden days when ships were wood and sailors were steel, sailing ships had no way to tell how fast they were going...save one. Some smart swabby came upon a clever idea. If he threw a barrel over the side with a long lanyard attached, he could watch how fast that rope paid out as the three master sailed away from the barrel.

And even more clever, if he tied a KNOT in that rope every nautical mile of its length, and then timed how long it took for the knots in the rope to pay out, he could figure how fast (in nautical miles per hour) the ship was sailing. Yep, knot came from real knots in a rope.

For example, if two knots were counted going out into the water in fifteen minutes, that clever swab would shout out to the Captain "Captain, we're doing eight knots per hour." As time wore on, the cry became "Captain, we're doing eight knots." And, there, landlubber, is the rest of the story.

By the way, although most of your answerers are technically correct about the length of a nautical mile, that length was originally settled in olden days as beiing equal to the length of one second of arc at the equator. It turns out that one second of arc is roughly 6,000 feet long at the equator; so the nautical mile (nm) is just a bit longer than the 5,280 feet of a land mile. It also turns out there are 21,600 seconds of arc; so the circumfrance of Earth at the equator is rougnly 21,600 nautical miles.

Answer 3

Per Wikipedia:

"1 knot = 1 nautical mile/hour = 1.852 km/h exactly. This is based on the internationally agreed length of the nautical mile, as adopted by the US in 1954, the UK in 1970 and other countries. This is the definition used in most, if not all, modern circumstances. Knot is sometimes mistakenly used to refer to the nautical mile itself, but this is incorrect."

Hope this helps!

Answer 4

1 nautical mile per hour. One nautical mile is 1852 meters, so this is equivelant to 1.1507794480235425117314881094 miles per hour, or 1.852 kilometers per hour. Knots are generally used to measure the speed of boats, while land vehicles and aircraft use the standard MPH or KPH scales.

Answer 5

1.15078030 miles per hour (US)