Gravitational force & escape velocity

  • Thread starter hadeel
  • Start date
  • #1
5
0

Main Question or Discussion Point

1- F = mk/r^2 ... k is -ve value ...why ?? please in concise way


2- for escape velocity .......
v( inital) = root ( 2gR ).... with proof

thank u
 

Answers and Replies

  • #2
Doc Al
Mentor
44,910
1,169
1- F = mk/r^2 ... k is -ve value ...why ?? please in concise way
Gravity is an attractive force, which acts in the -r direction.

2- for escape velocity .......
v( inital) = root ( 2gR ).... with proof
Prove it for yourself using conservation of energy.
 

Related Threads on Gravitational force & escape velocity

Replies
3
Views
770
Replies
10
Views
6K
Replies
7
Views
717
  • Last Post
Replies
7
Views
2K
Replies
4
Views
3K
Replies
6
Views
2K
  • Last Post
Replies
5
Views
4K
  • Last Post
Replies
15
Views
4K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
4
Views
2K
Top