Quick (Most likely simple) Question

  • Thread starter josht
  • Start date
  • #1
7
0
I was just curious why the moon has a pull on a tide facing the moon and on the complete opposite side of the earth it has the same pull.

-Josh
 

Answers and Replies

  • #2
1,997
5
I was just curious why the moon has a pull on a tide facing the moon and on the complete opposite side of the earth it has the same pull.
Actually the mass of the moon causes the earth to squeeze a bit.
 
  • #3
Garth
Science Advisor
Gold Member
3,574
105
I was just curious why the moon has a pull on a tide facing the moon and on the complete opposite side of the earth it has the same pull.

-Josh
Hi Josh! Welcome to these Forums!

One way of looking at it is to say on the Moon's side of the Earth the Moon pulls the ocean away from the Earth, on the other side the Moon pulls the Earth away from the ocean.

Another way of understanding it is to consider a sphere of dust particles, as a model of a 'fluid' Earth, falling towards the Moon. The 'left' and 'right' extremities are drawn towards the Moon and therefore close in on each other.

The sphere becomes an oblate spheroid because of the slightly different directions in which the Moon attracts different parts of the Earth. These are called tidal forces and are described both by Newtonian gravitation and General Relativity.

I hope this helps.

Garth
 

Related Threads on Quick (Most likely simple) Question

Replies
15
Views
5K
  • Last Post
Replies
4
Views
3K
Replies
15
Views
3K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
1K
Replies
4
Views
4K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
6
Views
1K
Top