Newton's Law of Motion

  • Thread starter senior
  • Start date
  • #1
3
0
What I want to ask is the (b) part (It's one of our old MTs). In the solution given, it talks about an acceleration,a3, on the horizontal axis. However, in the equation, the surface forces acting on m1 and m2, FN1 and FN2, are not affected by this acceleration, a3. Isn't that wrong?
 

Attachments

  • Q.png
    Q.png
    42.5 KB · Views: 426

Answers and Replies

  • #2
998
15
If a3 is the acceleration of the whole system, then FN1 and FN2 will be internal forces for the whole system and will have their corresponding equal and opposite forces by Newton's 3rd law. Hence FN1 and FN2 must not be considered to find a3.
 

Related Threads on Newton's Law of Motion

  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
1
Views
695
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
1
Views
9K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
18
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
12
Views
1K
Replies
1
Views
690
Replies
21
Views
8K
Top