1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The acceleration of gravity depends on its location

  1. Feb 21, 2015 #1
    CMIIW

    Therefore, if we jumped from the same height buildings
    which were located on different areas,
    such as North Pole and Jakarta,
    the person who launch from the former,
    would experience more fear
    than the person from the latter.

    This is because who jumped from the North Pole’s building,
    must fall towards the ground with higher speed
    than that of Jakarta’s.

    Or not?
     
    Last edited by a moderator: Feb 21, 2015
  2. jcsd
  3. Feb 21, 2015 #2

    Suraj M

    User Avatar
    Gold Member

    Fear? You can't gauge fear between two people, its relative for oneself and to gauge it for 2 different people is even more tough!
    Anyway your right on the fact that the guy at the pole would fall faster. this is because of earth's rotation.
    I'd like to ask you a related question, (because i'm not sure of the answer myself :smile: ) if you were to consider air resistance, would the difference be significant?
     
  4. Feb 21, 2015 #3
    Suraj M,

    Thanks for your reply.

    Right on.
    Fear depends.

    Air resistance?
    Have never imagined in this case.
    But I presume the difference won’t be significant.
     
  5. Feb 21, 2015 #4

    Dale

    Staff: Mentor

  6. Feb 21, 2015 #5

    DaveC426913

    User Avatar
    Gold Member

    The inclusion of fear in this question is odd. Fear is entirely subjective.
    The fear one might experience just being at the North Pole versus Jakarta would surely be a bigger factor than the speed at which one falls.

    More on-point though: the difference in acceleration is so slight that one could not possibly experience it directly. It's not like, as the person is falling, he will sense he is going faster and then feel fear proportional to his speed.
     
  7. Feb 21, 2015 #6

    Suraj M

    User Avatar
    Gold Member

    I dont understand what you mean, Dale. what do you mean by 'that large'?
     
  8. Feb 21, 2015 #7

    Dale

    Staff: Mentor

    The variation in the force of gravity at the surface of the earth is no more than 0.7% of the weight. This would be less than 1.5 pounds difference for a 200 lb man. If air resistance is also about 1.5 pounds then it would be as significant as the variation in g.
     
  9. Feb 21, 2015 #8

    Suraj M

    User Avatar
    Gold Member

    no Dale i was actually referring to the variation in air resistance at the poles as compared to the equator, are you also talking of the same thing?
     
  10. Feb 21, 2015 #9

    DaveC426913

    User Avatar
    Gold Member

    What makes you think there is a significant difference in air resistance between different parts of the planet? Sure, there's a little, based on temperature and altitude. But really, this is pretty insignificant when talking about falling off a building.
     
  11. Feb 21, 2015 #10

    Dale

    Staff: Mentor

    No, I wasn't. So let's not derail Sakamo's thread further trying to clarify something that wasn't his question.
     
  12. Feb 21, 2015 #11
    DaveC426913,
    The voice of authority.

    Suraj M,
    I presume what DaleSpam meant “that large” is
    “the large air resistance which could affect the gravity”.

    According to his Wiki link:
    Apparent gravity on the Earth's surface varies by around 0.7%,
    from 9.7639 m/s2 on the Nevado Huascarán mountain in Peru
    to 9.8337 m/s2 at the surface of the Arctic Ocean.


    The figure of the poles and the equator are within the range of them.
    There is no such powerful air resistance on the Earth which could affect the gravity.
    So there is nothing to consider the existence of the air resistance.

    (CMIIW).
     
    Last edited: Feb 21, 2015
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: The acceleration of gravity depends on its location
  1. Acceleration by Gravity (Replies: 11)

  2. Acceleration and Gravity (Replies: 11)

Loading...