Angular Momentum of Earth

  • #1

Homework Statement


Determine the angular momentum of the Earth about its rotation axis (assume the Earth is a uniform sphere).


Homework Equations


L = Iω
I = (2/5)Mr^2
ω = 2[itex]\pi[/itex]/T


The Attempt at a Solution


I = (2/5)(6.0 X 10^24 kg)(6.4 X 10^6m)^2
ω = 1.992 X 10^-7 rad/sec

L = (2/5)(6.0 X 10^24 kg)(6.4 X 10^6m)^2 * (1.992 X 10^-7 rad/sec)
What I get from this is 1.958 X 10^31 and the answer is supposed to be 7.1 X 10^33. where did I go wrong? Thank you
 

Answers and Replies

  • #2
TSny
Homework Helper
Gold Member
13,334
3,604
How long does it take the earth to rotate one revolution on its axis?
 

Related Threads on Angular Momentum of Earth

  • Last Post
Replies
5
Views
25K
  • Last Post
Replies
5
Views
6K
Replies
2
Views
3K
Replies
1
Views
5K
Replies
2
Views
4K
Replies
11
Views
807
Replies
2
Views
2K
Replies
8
Views
5K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
2K
Top