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I Skydiving question

  1. Mar 8, 2017 #1
    I'm wondering how to calculate the force exerted on a skydiver as they decelerate from their terminal velocity of approximately 120 mph to approximately 30 mph in the course of one second, as I have seen and felt while skydiving. Thank you all in advance.
  2. jcsd
  3. Mar 8, 2017 #2
    120 mph is 176 ft/sec and 30 mph is 44 ft/sec. So the deceleration is 132 ft/sec^2. This is about 4 g's.
  4. Mar 8, 2017 #3


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    Staff: Mentor

    Note that that assumes contact deceleration, which I would think equipment manufacturers try to achieve.
  5. Mar 8, 2017 #4


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    Homework Helper

    Instead of constant deceleration, there's some effort to also reduce the jerk, so that the initial deceleration is not as great as the maximum deceleration.
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