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Gravity to pounds of pressure

  1. Aug 4, 2015 #1
    i realize that we have no way to really conceptually feel other gravitys because at least most of have not been any other planets or moons.

    i was wondering if some one could tell me how to convert a planets gravity in the way of expressing it as pounds of pressure so i could have a better way of thinking about the differences on other bodys gravitys.
     
  2. jcsd
  3. Aug 4, 2015 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    Can you say more about your question? At least to me it isn't very clear what you are asking about. :smile:

    So when you are in a swimming pool and let out all of your breath and sink to the bottom, you are feeling about 0.1g or so, right? And if you are in a gymnastics training camp and are in the jumping training thing with the bungee cords attached to you, you feel about 0.5g, right?

    And if you put on a weight belt or a heavy backpack, you feel like the force of gravity is more than 1g on you, right?
     
  4. Aug 5, 2015 #3
    i mean how to calculate it for lets say the earths gravity 9.81m/s^2 how many pounds of force do you feel if you were on saturn's10.44 m/s^2 for instance how much more weight would you feel. my question is how much more weight you would feel and how to calculate that.

    thank you so much for the help !
     
  5. Aug 5, 2015 #4
    gilishaky,
    Easy way to do it is by direct comparison with earth gravity.

    Ratio of acceleration due to gravity of Saturn/Earth = 10.44 / 9.81 = 1.064. ( I neglected the units since they cancel out anyways, but it is a good idea to include units in calculations )

    Thus you can multiply the weight of an object on earth by that ratio, to get the weight on Saturn.
    And the cool thing is that the weight on earth can be in any unit you like be it pounds, tons, kg(weight), and so on.

    ie someone weighing 100 pounds on earth weighs 100 x 1.064 = 106.4 pounds.
     
  6. Aug 5, 2015 #5

    Drakkith

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    Staff: Mentor

    I agree with 256bits. The easiest way is to just divide whatever planet's acceleration due to gravity by 9.8 (Earth's gravity) to get a ratio of g-force and then multiply that by the persons weight in pounds.

    Moon: 1.622 / 9.8 = 0.1655
    0.1655 x 100 pounds = 16.55 pounds.
    A 100 pound person would weigh 16.55 pounds on the Moon.
     
  7. Aug 5, 2015 #6
    thank you both so much for the help !
     
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