Zero accerlation for spacewalking astronaut and sattelite?

  • Thread starter BadaBadi
  • Start date
  • #1
5
0
1. An 8- kg spacewalking astronaut pushes off a 640 kg satellite, exerting 100N force for the 0.5s it takes to straighten his arms. How far apart are they after 1 minute?



Homework Equations





3. So, I calculated the the accelration of the spaceman and the satelite during contact. My school has the solutions of the problems posted ( its an old assignment), and what I dont understand is that they calculate the accerlation and also the final velocities but then they go on to calculate the distance after contact with 0 accerlation. I dont understand why they take the accerlation after the contact to be 0. Sorry if it sounds like a stupid question
 

Answers and Replies

  • #2
Delphi51
Homework Helper
3,407
11
Welcome to PF, Bada.
While his hand is pushing on the spacecraft the spacecraft pushes back on his hand according to Newton's 3rd law. This force causes him to accelerate. After his hand loses contact, there is no pushing, no force on the astronaut so he doesn't accelerate.
 

Related Threads on Zero accerlation for spacewalking astronaut and sattelite?

  • Last Post
Replies
9
Views
5K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
1
Views
3K
Replies
16
Views
4K
  • Last Post
Replies
11
Views
1K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
2
Views
6K
S
  • Last Post
Replies
4
Views
4K
  • Last Post
Replies
3
Views
5K
Top