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Element 99

What is earth's gravititational force on an object 1000 km from the surface. At the surface it is 10m/sec^2

1.   0
2.   30 m/sec^2
3.   Something in between.
4.   There is no such thing as gravity...the earth sucks.
5.   What is gravity?
6.   Who really cares?

Posted - June 27, 2018
Tags : None

Responses


  • 44645
    F = m X a, where m is mass and a is acceleration, so the acceleration is part of the equation.
      June 28, 2018 7:27 AM MDT
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  • 5835
    Yes dear, and the same equation is written w = m X g where w is the weight, m is mass, and g is ACCELERATION OF GRAVITY!

    How does it happen that people know this but they don't know it? Weight is a force, gravity is not.
      June 28, 2018 8:39 AM MDT
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  • 44645
    What?? G (g) IS gravity. I am truly flummoxed. I will say nothing further.
      June 28, 2018 1:56 PM MDT
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  • 5835
    Yes, you are flummoxed. G is not g. G is the universal gravitation constant, and g is Earth gravitation constant, but neither is constant. G varies in the third decimal, and g depends on where you are and what is near you.

    Now this:

      June 28, 2018 9:32 PM MDT
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  • 44645
    I used the upper case G as it was the beginning of a sentence. Note the (g). I'll let you in on the trick of the question. The force of gravity is not measured from the surface, but from the centre of the earth. Thus, the gravitational force at 1000km above the surface is 75% of that from the surface. The differences of the force between the Marianas Trench and Mount Everest is minute, but measurable. That should clarify everything. Check your nearest physics book. This post was edited by Element 99 at June 29, 2018 5:16 PM MDT
      June 29, 2018 3:42 PM MDT
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  • 10052
    6

    What are you, a rocket scientist?
      June 27, 2018 8:00 PM MDT
    1

  • 44645
    No...a rocket surgeon.
      June 28, 2018 1:57 PM MDT
    1

  • 10052
    Do you know Trump's new bff? He's a rocket man, too. 
      June 28, 2018 5:40 PM MDT
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  • 5391
    Of the choices presented, I’m weighing #3, and possibly #6, except I know of satellite engineers who’d have interest in the answer. 
      June 27, 2018 8:18 PM MDT
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  • 44645
    BUT...You still answered it, nevertheless.
      June 28, 2018 7:28 AM MDT
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  • 10661
    Did someone let go of their balloon again?
      June 27, 2018 9:47 PM MDT
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  • 44645
    No, but my knickers are twisted.
      June 28, 2018 7:30 AM MDT
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  • 46117
    Number 2, of course.  I mean if you are positing the answer in that batch, it is the only sane answer.

    I think.

    When one does not possess even the faint glimmer of talent to possess a science or chemistry degree, you need to fly by seat of pants oftentimes.

    Albert Einstein.

      June 28, 2018 8:44 AM MDT
    1

  • 7794
    Hold on a minute. Let me go ask Neil deGrasse Tyson.
      June 28, 2018 1:58 PM MDT
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  • 5835
    Neil deGrasse Tyson is a mess.
      June 28, 2018 9:28 PM MDT
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  • 13395
    Depending on the position of the moon its gravitational force could have an effect to mess up your calculations -couldn't it?
      June 29, 2018 2:33 AM MDT
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  • 44645
    Only a minor (but measurable) effect.
      July 3, 2018 12:59 PM MDT
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  • 5354
    I think I've solved your nr 2 option "2. 30m/sec^2". You meant to write feet instead of meters "2. 30feet/sec^2"

    Of course that is more like the g-force at the surface of Earth, Instead of a thousand kilometers above it.
      July 6, 2018 11:21 AM MDT
    0