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Guess I'll km/s (lemmy.dbzer0.com)
submitted 2 years ago by to c/lemmyshitpost@lemmy.world
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[–] 2 points 2 years ago (1 child)

I used to do it this way in highschool, but could never remember if it was divide by or multiply by 3.6

Instead I now do it as you have shown, except it all goes in the same expression.

10 km/h * 1000 m/km * 1h/3600s = 2.778 m/s

No need for the extra steps. Slap it all in the same expression and put it in the calculator (being careful to check that the units cancel as intended)

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  • [–] 1 point 2 years ago (1 child)

    M/s is faster (lower number) than km/h so... That should give you enough explanation to understand whether you need to divide or multiply 3.6 when converting.

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  • [–] 1 point 2 years ago

    It just never stuck. Just for me personally it's easier to remember the base conversions of 1 km = 1000 m and 1 hr = 3600 and do the maths.

    Just my own personal preference, and when dealing with more complex units, is the only way.

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