2d:null 2e:["$","title",null,{"children":"Feet per second instead of miles per hour? | Jeremia Kimelman | Observable"}] 33:[] 31:{"id":"b73797daf5f72141","slug":"feet-per-second-instead-of-miles-per-hour","title":"Feet per second instead of miles per hour?","thumbnail":"7907101d3f29a2b5d3455c577dbe4e9712947564e32e4da2a581c7fb4e04c917","access_level":"public","create_time":"$D2022-10-05T04:21:36.365Z","update_time":"$D2024-03-18T04:19:07.448Z","view_time":null,"first_public_time":"$D2022-12-09T22:55:53.562Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"53ab69aac59784dd","login":"jeremiak","name":"Jeremia Kimelman","avatar_url":"https://avatars-next.observableusercontent.com/7368920b6513e0b928ca284cfdfda6e944f0e61c6bb9217b878231a2febce907","tier":"starter_2024"},"version":79,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"9762765df1e9b90e","login":"jeremiak","name":"Jeremia Kimelman","avatar_url":"https://avatars-next.observableusercontent.com/7368920b6513e0b928ca284cfdfda6e944f0e61c6bb9217b878231a2febce907","tier":null}],"members":[{"type":"individual","id":"9762765df1e9b90e","login":"jeremiak","name":"Jeremia Kimelman","avatar_url":"https://avatars-next.observableusercontent.com/7368920b6513e0b928ca284cfdfda6e944f0e61c6bb9217b878231a2febce907","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Feet per second instead of miles per hour?","cells":[{"id":0,"value":"md`# Feet per second instead of miles per hour?\n\nAn hour is a long time and a mile is a long distance; miles per hour seems almost designed to be abstract and hard to fathom.\n\n15 miles per hour doesn't sound that fast, it's the speed that's frequently allowed in residential neighborhoods in California. But a driver traveling at that speed will travel ${calculateFeetPerSecond(\n 15\n)} feet in just a single second. Way less than the time it takes to glance and read a text message.\n\nWhat would change about driver behavior if the speedometer, the speed limit signs, and all the marketing materials around cars were denominated in feet per second instead of miles per hour?`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":8,"value":"viewof speed = Inputs.range([0, 100], {\n label: \"Speed (mph)\",\n step: 1,\n value: 25\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":32,"value":"md`A car traveling ${speed} miles per hour moves through ${feetPerSecond} feet per second.`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":42,"value":"{\n return html`Some common speeds:

${s} mph - ${calculateFeetPerSecond(s)} feet per second

`;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":38,"value":"function calculateFeetPerSecond(s) {\n const feetPerHour = s * feetPerMile;\n const feetPerMinute = feetPerHour / 60;\n const feetPerSecond = feetPerMinute / 60;\n\n return Math.floor(feetPerSecond);\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":69,"value":"speeds = [10, 20, 25, 30, 40, 45, 65, 75, 80]","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":71,"value":"speedsBoth = [0, ...speeds].map((mph) => {\n const fps = calculateFeetPerSecond(mph);\n return {\n mph,\n fps\n };\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":73,"value":"Plot.plot({\n marks: [Plot.line(speedsBoth, { x: \"mph\", y: \"fps\" })]\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":17,"value":"feetPerSecond = calculateFeetPerSecond(speed)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":19,"value":"feetPerMile = 5280","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 32:"$31:body"