A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

Mount Everest is approx. 9km high. Calculate how much less a mountaineer of mass 100kg(with a back pack would weigh at its summit, compares to her weight at sea level.

  • This Question is Closed
  1. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    we will first find the gravitational force by F=GM/r^2, the use that to find the weight, w=mg right?

  2. JamesJ
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Use Newton's Universal Law of Gravity as you did in your last question. You'll need M = mass of earth R = radius of earth at sea level m = her weight = 100 kg Then her weight at sea level is \[Weight_{sea \ level} = F_{gravity \ @ \ sea \ level} = \frac{GMm}{R^2} \] while atop Everest her weight is \[ Weight_{Everest} = F_{gravity \ atop \ Everest} = \frac{GMm}{(R + 9)^2} \]

  3. JamesJ
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    actually, you should measure distance in meters, so you need R in meters, and then atop Everest, the force due to gravity is \[ \frac{GMm}{(R+9000)^2} \]

  4. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the equation I wrote should be g=GM/r2 Isn't it more simpler to use this equation than GMm/r2?

  5. JamesJ
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    As weight, W = mg, you're doing exactly the same thing. Just breaking up the calculation into two pieces.

  6. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    true :)

  7. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.