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153 lines
6.2 KiB
HTML
153 lines
6.2 KiB
HTML
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<head>
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<title>Metric Speed (Velocity)</title>
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<script language="JavaScript" type="text/javascript">reSpell=[["meter","metre"],["meters","metres"],["kilometer","kilometre"],["kilometers","kilometres"],["traveling","travelling"]];</script>
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<h1 align="center">Metric 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>Meters per second (m/s)</b></li>
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<li><b>Kilometers per hour (km/h)</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><h3>Speed in meters per second (m/s)</h3>
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<p>If something is traveling at 1 m/s it moves <b>1 meter every second</b>.</p>
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<p>It is a gentle walking speed.</p>
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<p>One hour walking at 1 m/s moves you 3.6 km. </p>
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<div style="clear: left"></div>
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<br />
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<h3>Speed in kilometers per hour (km/h)</h3>
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<div class="indent50px">
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<p>If something is traveling at 1 km/h it moves <b>1 kilometer every hour</b>.</p>
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<p>1 km/h is like a <b>very slow</b> walking speed.</p>
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<p>Kilometers 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>100 km/h</b></p>
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<p>One hour at this speed moves you 100 km.</p>
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</div>
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<script src="images/speed.js"></script>
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<script>speedMain();</script>
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<div class="example">
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<p>Example: One <b>minute</b> at 60 km/h moves you <b>1 km</b>.</p>
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</div>
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<h2>Converting</h2>
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<p>You can convert from m/s to km/h:</p>
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<div class="bigul"><ul>
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<li>1 m/s = 3.6 km/h</li>
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<li>1 km/h = 0.2777... m/s</li>
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</ul></div>
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<div class="example">
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<h3>Example: What is 100 km/h in m/s?</h3>
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<p>A kilometer has 1,000 meters, and an hour has 3,600 seconds, so 100 kilometers per hour is:</p>
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<ul>
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<li>100 x 1,000 / 3,600 = 27.777... m/s</li>
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</ul>
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<p align="center"><span class="larger">100 km/h = 27.78 m/s</span> (to 2 decimal places)</p>
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</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 5 km/h that is a speed.</p>
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<p>But when we say it is moving at <b>5 km/h 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>Examples</h2>
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<p> 100 km/h is about:</p>
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<ul>
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<li>how fast we can legally go on many highways</li>
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<li>the maximum running speed of a cheetah </li>
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<li>half the freefall speed of a skydiver</li>
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</ul>
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<p>60 km/h is about:</p>
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<ul>
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<li>going very fast on a bicycle </li>
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<li>the speed needed to go one kilometer in a minute </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 meter per second is:</p>
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<ul>
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<li>about 3.2808 feet per second</li>
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</ul>
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<p>1 kilometer per hour is</p>
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<ul>
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<li>about 0.9113 feet per second</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(1045, 1046, 2196, 2197, 2198, 2199, 3730, 3731, 3732, 3733);</script>
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</div>
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<div class="related"> <a href="metric-system.html">Metric System</a> <a href="index.html">Measurement Index</a> </div>
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Copyright © 2017 MathsIsFun.com
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