Velocities

Unit	m/s	kms/h	mile/h
mile / hour m/s km/h	0.44704 1 0.277778	1.60934 3.6 1	1 2.23694 0.62137

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Velocity is the distance travelled in one second (m/s).

The following speeds are approximate and are assumed to be constant and in a straight direction and therefore are also the velocity.

Description marked R are speed records.

	m/s	km/h	mile/hour	Beaufort Scale
Calm	0	<1	0		Smoke rises vertically
Light Air	0.8	3	2	1	Smoke rises on angle
Man walking	1.5	5.5.	3.5
Light breeze	2.5	9	5.6	2	Feel wind on face
Gentle breeze	4.5	16	10	3	Flags extend
Moderate breeze	7	25	15.5	4	Raises dust
Fresh breeze	10	35	22	5	Trees sway, waves
Runner 100m R	10	35	22
Strong breeze	12.5	45	28	6	Telegraph wires whistle
Racehorse trotting R	15	54	33
Moderate gale	15.5	56	35	7	Difficult to walk
Fresh gale	18.5	67	42	8	Branches break
Racehorse R	19	68	42.5
Ostrich	20	72	45
Racing cyclist R	22	79	49
Strong gale	23	82	51	9	Slight building damage
Whole gale	26.5	96	60	10	Trees uprooted
N.Z. Road speed limit	28	100	62.5
Skier downhill	28	100	62.5
Storm	31	111	69	11	Widespread damage
Low wind speed NZS 3604	32	115	71
Hurricane	33.5	120	75	12	Severe damage
Medium wind speed NZS 3604	37	133	83
High wind speed NZS 3604	44	158	98
AS/NZS 1170	45	162	101
Swift - fastest bird	47	169	105
Very high wind speed NZS 3604	50	180	111
AS/NZS 1170 (Cook Strait)	51	184	114
Moderate cyclone	55	198	153
Tennis serve R	66	238	148
Bullet train (Japan)	69	248	154
Severe tropical cyclone	70	252	157
TGV express train	77	277	172
Wind R	103	371	230
Boeing 747	256	920	572
Sound in air	333	1199	743
Land speed R	341	1228	763
Rotation of earth at equator	465	1674	1040
Concorde	649	2336	1452
303 Bullet	792	2851	1772
Lockheed Blackbird R	981	3529	2193
Moon round the earth	1000	3600	2237
Sound through steel	5100	18360	11408
To escape earth’s gravity	7823	28163	17500
Fastest man has travelled	11176	40234	25000
Earth round the sun	29700	106920	66437
Pioneer space probe	66720	240192	149248
Light and electric waves	299388000	1077614064	669600000	186,000 miles/sec

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