Help me understand the meaning of these lines

  • #1
navneet9431
Gold Member
107
9
IMG_20180819_154732.jpg

What does the author want to say through these lines?
What is the *harm* he is talking about?

I will be thankful for any help!
 

Attachments

Answers and Replies

  • #2
PeroK
Science Advisor
Homework Helper
Insights Author
Gold Member
2020 Award
16,656
8,572
It's a strange way to describe things. The calculation involving a finite ##dx## is an approximation. You effectively take the mass element from ##x## to ##x + dx## all to be at position ##x##. As ##dx## gets smaller, the approximation gets better. The limit ##dx \rightarrow 0## is the integral.
 

Related Threads on Help me understand the meaning of these lines

Replies
54
Views
16K
Replies
7
Views
2K
  • Last Post
Replies
8
Views
3K
  • Last Post
Replies
22
Views
8K
Replies
15
Views
55K
Replies
8
Views
2K
Replies
1
Views
553
  • Last Post
Replies
1
Views
2K
Replies
3
Views
2K
Replies
15
Views
2K
Top