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Velocity calculation in US system from acceleration

  1. Jan 12, 2015 #1
    I've been working exclusively in SI units up until now, so using the US System trips me up.

    Given force in pounds-force, I divide it by mass (units are pound-mass) to get acceleration. I take the integral of acceleration to get velocity, which, according to the US Units, are in mph. Am I reading this correctly?
     
  2. jcsd
  3. Jan 12, 2015 #2

    jbriggs444

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    If you divide pounds force by pounds mass to get acceleration you will get a result in g's. One g is approximately 32 feet/sec2. For example, 3 pounds force applied to 2 pounds mass will produce an acceleration of 1.5 g's = 48 feet/sec2.

    You can integrate acceleration in feet/sec2 over time to get a result in feet per second. Then the conversion from feet per second to miles per hour involves knowing that there are 5280 feet in a mile and 3600 seconds in an hour.
     
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