What Inertia is used for?

  • Thread starter GrizzlyBat
  • Start date
  • #1
36
0

Main Question or Discussion Point

Hey, I was just wondering what Inertia is used for? I mean, I am not talking about Rotation Inertia or anything like that. I am wondering what the term means "when something resists movement". I have a feeling that it is an old term that people stopped using, but why?
 

Answers and Replies

  • #2
537
2


Push a shopping cart. You can see how much it accelerates. Remember how hard you pushed. Now go over to a train full of elephants and push it just that hard. It doesn't accelerate nearly as much. What the train has more of, that the shopping cart has less of, that's inertia. You can't call it its weight because you'd get the same result if you were floating in space far from any world's gravity. Why do most people not need the word "inertia"? Because it _proportional_ to weight, so in ordinary conversation most people just call it the weight. People won't learn a word unless they find it helpful for something.
 

Related Threads for: What Inertia is used for?

  • Last Post
Replies
9
Views
903
Replies
1
Views
5K
Replies
21
Views
2K
Replies
5
Views
776
Replies
1
Views
11K
Top