Something about applied dynamics.

http://img211.imageshack.us/img211/6048/a1a1.gif [Broken]
http://img17.imageshack.us/img17/6684/b1b1.gif [Broken]

May i know actually why initially 2SA+SB=l , but after differentiate, it becomes 2 aA = -aB ?
why does the l disappear?
 
Last edited by a moderator:
776
9
This thread does not belong here. Please move it to the homework thread.

Matt
 

tiny-tim

Science Advisor
Homework Helper
25,790
249
Hi aiklone1314! :smile:
May i know actually why initially 2SA+SB=l , but after differentiate, it becomes 2 aA = -aB ?
why does the l disappear?
2SA+SB = l, so 2aA+aB=0 (because l is a constant), so 2aA = -aB :wink:
 
but how to know SA and SB is not a constant?
 

tiny-tim

Science Advisor
Homework Helper
25,790
249
but how to know SA and SB is not a constant?
If sA is constant, then vA and aA will be 0 (same for sB)
 

Related Threads for: Something about applied dynamics.

  • Posted
Replies
2
Views
1K
Replies
4
Views
694
Replies
4
Views
1K
Replies
3
Views
2K
Replies
4
Views
2K
Replies
5
Views
4K
Replies
9
Views
581

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

Hot Threads

Top