• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Two quick orbit orbit qs!

  • Thread starter bon
  • Start date

bon

559
0
1. Homework Statement

1) A satellite is in circular orbit around the sun. Which requires the greater change in satellite's speed: to escape the solar system or fall into the sun?

2)Why does atmospheric friction increase the speed of a satellite in low earth orbit?

2. Homework Equations



3. The Attempt at a Solution

1) Not sure..Surely the change in speed in 2 cases would be the same?

2) Again ..not sure.. :S
 

tiny-tim

Science Advisor
Homework Helper
25,790
249
hi bon! :smile:
1) A satellite is in circular orbit around the sun. Which requires the greater change in satellite's speed: to escape the solar system or fall into the sun?

1) Not sure..Surely the change in speed in 2 cases would be the same?
(if the Sun has mass M and if the orbit has radius r …)

What initial speed is needed to escape to infinity?

What initial speed is needed to reach the Sun?
2)Why does atmospheric friction increase the speed of a satellite in low earth orbit?
It stays in orbit: but what happens to the orbit?
 

Related Threads for: Two quick orbit orbit qs!

Replies
11
Views
869
Replies
2
Views
3K
Replies
1
Views
2K
Replies
7
Views
2K
Replies
25
Views
2K
Replies
2
Views
3K
  • Posted
Replies
10
Views
904
Replies
3
Views
503

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top