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.
Metres per second (m/s) may seem inconspicuous, but it plays a critical role in understanding speed and velocity in scientific contexts. The unit underpins numerous fundamental concepts in physics and engineering, such as calculating the speed of sound at approximately 343 m/s in air at room temperature. This speed metric is also central to space exploration, where spacecraft velocity is often measured in meters per second to ensure precision in navigation and successful missions.
Beyond Earth, Jupiter’s moon, Io, erupts volcanic plumes that reach speeds of over 1,000 m/s, showcasing this unit’s application in celestial phenomena. Transitioning to daily life, elite athletes can clock speeds around 10 m/s during sprints, a testament to human capability. By providing a consistent metric, meters per second serves as a universal bridge across varied disciplines and contexts.
| Feet per second | Metres per second |
|---|---|
0
ft/s
|
0
m/s
|
1
ft/s
|
0.3048
m/s
|
2
ft/s
|
0.6096
m/s
|
3
ft/s
|
0.9144
m/s
|
4
ft/s
|
1.2192
m/s
|
5
ft/s
|
1.524
m/s
|
6
ft/s
|
1.8288
m/s
|
7
ft/s
|
2.1336
m/s
|
8
ft/s
|
2.4384
m/s
|
9
ft/s
|
2.7432
m/s
|
10
ft/s
|
3.048
m/s
|
11
ft/s
|
3.3528
m/s
|
12
ft/s
|
3.6576
m/s
|
13
ft/s
|
3.9624
m/s
|
14
ft/s
|
4.2672
m/s
|
15
ft/s
|
4.572
m/s
|
16
ft/s
|
4.8768
m/s
|
17
ft/s
|
5.1816
m/s
|
18
ft/s
|
5.4864
m/s
|
19
ft/s
|
5.7912
m/s
|
20
ft/s
|
6.096
m/s
|
21
ft/s
|
6.4008
m/s
|
22
ft/s
|
6.7056
m/s
|
23
ft/s
|
7.0104
m/s
|
24
ft/s
|
7.3152
m/s
|
25
ft/s
|
7.62
m/s
|
26
ft/s
|
7.9248
m/s
|
27
ft/s
|
8.2296
m/s
|
28
ft/s
|
8.5344
m/s
|
29
ft/s
|
8.8392
m/s
|
30
ft/s
|
9.144
m/s
|
31
ft/s
|
9.4488
m/s
|
32
ft/s
|
9.7536
m/s
|
33
ft/s
|
10.0584
m/s
|
34
ft/s
|
10.3632
m/s
|
35
ft/s
|
10.668
m/s
|
36
ft/s
|
10.9728
m/s
|
37
ft/s
|
11.2776
m/s
|
38
ft/s
|
11.5824
m/s
|
39
ft/s
|
11.8872
m/s
|
40
ft/s
|
12.192
m/s
|
41
ft/s
|
12.4968
m/s
|
42
ft/s
|
12.8016
m/s
|
43
ft/s
|
13.1064
m/s
|
44
ft/s
|
13.4112
m/s
|
45
ft/s
|
13.716
m/s
|
46
ft/s
|
14.0208
m/s
|
47
ft/s
|
14.3256
m/s
|
48
ft/s
|
14.6304
m/s
|
49
ft/s
|
14.9352
m/s
|
50
ft/s
|
15.24
m/s
|
51
ft/s
|
15.5448
m/s
|
52
ft/s
|
15.8496
m/s
|
53
ft/s
|
16.1544
m/s
|
54
ft/s
|
16.4592
m/s
|
55
ft/s
|
16.764
m/s
|
56
ft/s
|
17.0688
m/s
|
57
ft/s
|
17.3736
m/s
|
58
ft/s
|
17.6784
m/s
|
59
ft/s
|
17.9832
m/s
|
60
ft/s
|
18.288
m/s
|
61
ft/s
|
18.5928
m/s
|
62
ft/s
|
18.89759
m/s
|
63
ft/s
|
19.20239
m/s
|
64
ft/s
|
19.50719
m/s
|
65
ft/s
|
19.81199
m/s
|
66
ft/s
|
20.11679
m/s
|
67
ft/s
|
20.42159
m/s
|
68
ft/s
|
20.72639
m/s
|
69
ft/s
|
21.03119
m/s
|
70
ft/s
|
21.33599
m/s
|
71
ft/s
|
21.64079
m/s
|
72
ft/s
|
21.94559
m/s
|
73
ft/s
|
22.25039
m/s
|
74
ft/s
|
22.55519
m/s
|
75
ft/s
|
22.86
m/s
|
76
ft/s
|
23.16479
m/s
|
77
ft/s
|
23.46959
m/s
|
78
ft/s
|
23.77439
m/s
|
79
ft/s
|
24.07919
m/s
|
80
ft/s
|
24.38399
m/s
|
81
ft/s
|
24.68879
m/s
|
82
ft/s
|
24.99359
m/s
|
83
ft/s
|
25.29839
m/s
|
84
ft/s
|
25.60319
m/s
|
85
ft/s
|
25.90799
m/s
|
86
ft/s
|
26.21279
m/s
|
87
ft/s
|
26.51759
m/s
|
88
ft/s
|
26.82239
m/s
|
89
ft/s
|
27.12719
m/s
|
90
ft/s
|
27.43199
m/s
|
91
ft/s
|
27.73679
m/s
|
92
ft/s
|
28.04159
m/s
|
93
ft/s
|
28.34639
m/s
|
94
ft/s
|
28.65119
m/s
|
95
ft/s
|
28.95599
m/s
|
96
ft/s
|
29.26079
m/s
|
97
ft/s
|
29.56559
m/s
|
98
ft/s
|
29.87039
m/s
|
99
ft/s
|
30.17519
m/s
|
100
ft/s
|
30.48
m/s
|
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