Wikipedia:Reference desk/Archives/Mathematics/2022 August 11

= August 11 =

Running at 17 km/h
I watched https://youtube.com/shorts/wvvqg8Hf7vY?feature=share and I was wondering how many seconds is necessary to run 100 meters at 17 km/h ... more or less than 9,58 seconds (Usain Bolt record)? 158.148.99.99 (talk) 19:32, 11 August 2022 (UTC)


 * 21.18 seconds, divide distance by speed (note the factor of 1000 between kilometes and metres) and multiple by 3600 seconds per hour.2A00:23C6:AA0D:F501:6853:53E9:A89C:AE6B (talk) 21:21, 11 August 2022 (UTC)


 * Only that it is not 17 km/h in the video, but 17 miles/h, equal to 27.36 km/h, giving the 100 meter time as 13.16. The time for a 60 m run at that speed is some 7.89, which is about as long as she is actually running. The world age record in 60 m for 12 year old girls is 7.63. But then, the girl in the video is running with a flying start, which would gain her perhaps as much as one second. --T*U (talk) 13:51, 15 August 2022 (UTC)