Is acceleration relative or absolute?

  • #26
PAllen
Science Advisor
2019 Award
8,162
1,426
"Consider a spaceship passing a planet: The spaceship will experience 'gravitational attraction', meaning the effects of spacetime curvature, departing from a constant velocity, and experience a proper acceleration in doing so."

Isn't that incorrect? Assuming the spaceship is drifting past the planet, the ship would always be in inertial free fall right? No proper acceleration, no reading on the accelerometer?
Yes, you are correct. If the curvature was extreme, the ship would experience tidal forces, but not proper acceleration as a whole.
 
  • #27
5,601
40
Isn't that incorrect? Assuming the spaceship is drifting past the planet, the ship would always be in inertial free fall right?
I was assuming a ship under power...I should have specified that.....good clarification....
 

Related Threads on Is acceleration relative or absolute?

  • Last Post
Replies
21
Views
12K
  • Last Post
Replies
14
Views
1K
Replies
11
Views
4K
Replies
10
Views
4K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
15
Views
14K
Replies
6
Views
5K
  • Last Post
2
Replies
38
Views
5K
  • Last Post
Replies
15
Views
3K
  • Last Post
3
Replies
61
Views
6K
Top