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145 lines
6.1 KiB
HTML
145 lines
6.1 KiB
HTML
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<title>US Standard Speed (Velocity)</title>
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<h1 align="center">US Standard Speed (Velocity)</h1>
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<p>These are the most common measurements:</p>
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<div id="midul">
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<ul>
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<li><b>Feet per Second (fps)</b></li>
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<li><b>Miles per Hour (mph)</b></li>
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</ul></div>
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<p style="float: left; margin: 10px;"><img src="images/walking.jpg" alt="walking" width="101" height="200" /></p><p> </p>
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<h3>Speed in feet per second (fps)</h3>
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<p>If something is traveling at 1 fps it moves <b>1 foot every second</b>.</p>
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<p>It is a <b>very slow</b> walking pace.</p>
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<p>An hour and a half at 1 fps moves you about 1 mile.</p>
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<div style="clear: left"></div>
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<h3>Speed in miles per hour (mph)</h3>
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<div class="indent50px">
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<p>If something is traveling at 1 mph it moves <b>1 mile every hour</b>.</p>
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<p>It is a <b>slow</b> walking pace.</p>
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<p>One hour walking at 1 mph moves you 1 mile.</p>
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<p>Miles per hour is often used for car speeds.</p>
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</div>
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<div class="example">
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<p>Example: Highway speed is around <b>60 mph</b></p>
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<p> One <b>minute</b> at 60 mph will move you <b>1 mile</b>.</p>
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</div>
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<h2>Converting</h2>
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<p>You can convert from fps to mph:</p>
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<div class="bigul">
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<ul>
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<li>1 mph = 1.4666... fps</li>
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<li>1 fps = 0.68181818... mph</li>
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</ul>
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</div>
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<div class="example">
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<h3>Example: What is 60 mph in fps?</h3>
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<p>A mile has 5,280 feet, and an hour has 3,600 seconds, so 60 miles per hour is:</p>
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<ul>
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<li>60 x 5,280 / 3,600 = 88 fps </li>
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</ul>
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<p align="center" class="larger">60 mph = 88 fps </p></div>
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<h2>Velocity</h2>
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<div class="indent50px">
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<p>Velocity is speed with a <b>direction</b>.</p>
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<p>So if something is moving at <b>5 mph</b> that is a <b>speed</b>.</p>
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<p>But if you say it is moving at <b>5 mph westwards</b> that is a <b>velocity</b>.</p>
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<p>If something moves backwards and forwards very fast it has a high speed, but a low (or zero) velocity</p>
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</div><h2>More Examples</h2>
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<p> 60 mph is about:</p>
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<ul>
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<li>how fast you can legally go on a highway</li>
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<li>the maximum running speed of a cheetah </li>
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<li>the speed needed to drive one mile in a minute </li>
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<li>half the freefall speed of a skydiver</li>
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</ul>
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<p>35 mph is about:</p>
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<ul>
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<li>the speed limit in the city </li>
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<li>going very fast on a bicycle </li>
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<li>the speed of a racehorse on a short track</li>
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<li>full running speed of a Bengal Tiger </li>
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</ul>
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<p>1 foot per second is: </p>
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<ul>
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<li>exactly 0.3048 meters per second</li>
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<li>approximately 0.6818 miles per hour</li>
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<li>exactly 1.09728 km per hour</li>
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</ul>
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<p> </p>
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<div class="questions">
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<script type="text/javascript">getQ(1047, 1048, 2200, 2201, 2202, 2203, 3734, 3735, 3736, 3737);</script>
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<div class="related"><a href="us-standard-units-introduction.html">US Standard Units Introduction</a> <a href="index.html">Measurement Index</a> </div>
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