Foot per second (ft/s) is a unit commonly used to measure velocity, particularly in the United States. It’s fascinating to note that this unit offers a unique perspective on speed, especially when compared to more universal units like meters per second. For instance, the speed of sound travels at approximately 1,125 feet per second, illustrating just how fast sound waves can move. Moreover, this unit is an essential part of the British Imperial and U.S. customary systems, embodying the historical evolution of measurement standards.
Interestingly, foot per second was also a critical measure in ancient construction and engineering, where precision in the rate of stone placement or water flow impacted architectural marvels. Today, it’s frequently applied in sports science to analyze athletic performances, such as a sprinter’s burst off the starting blocks or the flight speed of a baseball pitcher’s throw. This unit continues to bridge past engineering feats with modern technological applications, providing a unique linkage of history and contemporary science.
The mile per hour, commonly abbreviated as mph, is a unit of speed originating from the British imperial system and widely used in the United States and the United Kingdom. It’s fascinating to know that the concept of mph has historical significance dating back to the invention of the first automobiles in the late 19th century. The iconic cars of the 1920s, often called “classic cars,” were among the first to publicly advertise their capabilities in mph, including models like the Ford Model T, which had a top speed of about 45 mph.
Interestingly, mph is still the primary speed measurement unit for most road signage in countries such as the US and the UK, even while the rest of the world predominantly uses kilometers per hour (kph). The land-speed record attempts, including those made with the supersonic car “ThrustSSC,” which achieved an astonishing 763 mph in 1997, also emphasize the significance of this unit in measuring extreme speeds.
| Feet per second | Miles per hour |
|---|---|
0
ft/s
|
0
mph
|
1
ft/s
|
0.681818
mph
|
2
ft/s
|
1.36364
mph
|
3
ft/s
|
2.04545
mph
|
4
ft/s
|
2.72727
mph
|
5
ft/s
|
3.40909
mph
|
6
ft/s
|
4.09091
mph
|
7
ft/s
|
4.77273
mph
|
8
ft/s
|
5.45454
mph
|
9
ft/s
|
6.13636
mph
|
10
ft/s
|
6.81818
mph
|
11
ft/s
|
7.5
mph
|
12
ft/s
|
8.18182
mph
|
13
ft/s
|
8.86363
mph
|
14
ft/s
|
9.54545
mph
|
15
ft/s
|
10.22727
mph
|
16
ft/s
|
10.90909
mph
|
17
ft/s
|
11.59091
mph
|
18
ft/s
|
12.27272
mph
|
19
ft/s
|
12.95454
mph
|
20
ft/s
|
13.63636
mph
|
21
ft/s
|
14.31818
mph
|
22
ft/s
|
15
mph
|
23
ft/s
|
15.68181
mph
|
24
ft/s
|
16.36363
mph
|
25
ft/s
|
17.04545
mph
|
26
ft/s
|
17.72727
mph
|
27
ft/s
|
18.40909
mph
|
28
ft/s
|
19.0909
mph
|
29
ft/s
|
19.77272
mph
|
30
ft/s
|
20.45454
mph
|
31
ft/s
|
21.13636
mph
|
32
ft/s
|
21.81818
mph
|
33
ft/s
|
22.5
mph
|
34
ft/s
|
23.18181
mph
|
35
ft/s
|
23.86363
mph
|
36
ft/s
|
24.54545
mph
|
37
ft/s
|
25.22727
mph
|
38
ft/s
|
25.90908
mph
|
39
ft/s
|
26.5909
mph
|
40
ft/s
|
27.27272
mph
|
41
ft/s
|
27.95454
mph
|
42
ft/s
|
28.63636
mph
|
43
ft/s
|
29.31817
mph
|
44
ft/s
|
30
mph
|
45
ft/s
|
30.68181
mph
|
46
ft/s
|
31.36363
mph
|
47
ft/s
|
32.04545
mph
|
48
ft/s
|
32.72726
mph
|
49
ft/s
|
33.40908
mph
|
50
ft/s
|
34.0909
mph
|
51
ft/s
|
34.77272
mph
|
52
ft/s
|
35.45454
mph
|
53
ft/s
|
36.13635
mph
|
54
ft/s
|
36.81817
mph
|
55
ft/s
|
37.5
mph
|
56
ft/s
|
38.18181
mph
|
57
ft/s
|
38.86363
mph
|
58
ft/s
|
39.54544
mph
|
59
ft/s
|
40.22726
mph
|
60
ft/s
|
40.90908
mph
|
61
ft/s
|
41.5909
mph
|
62
ft/s
|
42.27272
mph
|
63
ft/s
|
42.95453
mph
|
64
ft/s
|
43.63635
mph
|
65
ft/s
|
44.31817
mph
|
66
ft/s
|
45
mph
|
67
ft/s
|
45.68181
mph
|
68
ft/s
|
46.36362
mph
|
69
ft/s
|
47.04544
mph
|
70
ft/s
|
47.72726
mph
|
71
ft/s
|
48.40908
mph
|
72
ft/s
|
49.0909
mph
|
73
ft/s
|
49.77271
mph
|
74
ft/s
|
50.45453
mph
|
75
ft/s
|
51.13635
mph
|
76
ft/s
|
51.81817
mph
|
77
ft/s
|
52.5
mph
|
78
ft/s
|
53.1818
mph
|
79
ft/s
|
53.86362
mph
|
80
ft/s
|
54.54544
mph
|
81
ft/s
|
55.22726
mph
|
82
ft/s
|
55.90908
mph
|
83
ft/s
|
56.59089
mph
|
84
ft/s
|
57.27271
mph
|
85
ft/s
|
57.95453
mph
|
86
ft/s
|
58.63635
mph
|
87
ft/s
|
59.31817
mph
|
88
ft/s
|
60
mph
|
89
ft/s
|
60.6818
mph
|
90
ft/s
|
61.36362
mph
|
91
ft/s
|
62.04544
mph
|
92
ft/s
|
62.72726
mph
|
93
ft/s
|
63.40907
mph
|
94
ft/s
|
64.09089
mph
|
95
ft/s
|
64.77271
mph
|
96
ft/s
|
65.45453
mph
|
97
ft/s
|
66.13635
mph
|
98
ft/s
|
66.81816
mph
|
99
ft/s
|
67.5
mph
|
100
ft/s
|
68.1818
mph
|
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