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Calculating G Force

  1. Feb 28, 2014 #1
    Hey everyone I have a question that I'm wondering if it can be answered, I'm not into physics and don't know how to calculate it out. my question is if 40 lbs fell from a height of 8 feet how many G forces would be created on impact. the reason i'm asking is due to a real life scenario. thanks.
  2. jcsd
  3. Feb 28, 2014 #2


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    Staff: Mentor

    It depends on the braking distance at the floor. For uniform accelerations (which is basically the minimal-G-scenario), the product of acceleration and corresponding distance is the same for the free fall and the impact. Then you just have to add 1 to the G-value due to gravity during the deceleration process.
  4. Feb 28, 2014 #3


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    G-forces at the floor are due to the interaction of the falling body and the floor. If both are very stiff (hard), then your accelerometer will indicate many g's ... a disk drive falling off of your desk onto a concrete floor may hit 50 g's of acceleration, while it may be only a few if it hits a pillow.

    See http://en.wikipedia.org/wiki/G-force
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