Mar 13th 2017, 04:08 PM
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#7 |
Physics Team
Join Date: Jun 2010 Location: Morristown, NJ USA
Posts: 2,280
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Originally Posted by Zman This at 40 mph still should be the same right? 965.6064/40 = 24.14016??? |
Be careful with units! Your original formula was:
$\displaystyle \frac { 600 \ miles }{40 \frac {miles}{hour} } = 15 \ hours$
When you converted 600 miles to Km, but did not convert 40 miles per hour to kilometers per hour, what you get is this:
$\displaystyle \frac { 965 \ Km} {40 \ miles/Hr } = 24.1 \frac {Km-Hr}{mile} $
Don't know about you, but this is not a unit of time I'm used to! You need to convert 40 MPH to kilometers per hour, which is 64.4 KPH:
$\displaystyle \frac {965 \ Km}{64.4 \ Km/Hr} = 15 \ Hr$
Hope this helps.
Last edited by ChipB; Mar 13th 2017 at 08:16 PM.
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