• Support PF! Buy your school textbooks, materials and every day products Here!

Force reactions of balls in a tube

  • Thread starter Karol
  • Start date
  • #1
1,380
22

Homework Statement


Two smooth balls of radius 10[cm] and weight 6[kg] are inside a tube of radius 16[cm] that's on the table. what are the reactions from the walls and what is the minimum mass of the tube to be in equilibrium

Homework Equations


Disassembling of forces using trigonometry

The Attempt at a Solution


The middle triangle is a classic 3-4-5 straight angle triangle multiplied by 15 so the reactions from the walls are 3x15=45. but the reactions are horizontal so at any weight the cylinder stays in place, no?
 

Attachments

Answers and Replies

  • #2
19,919
4,095
Aren't the balls exerting a moment on the tube?

Chet
 
  • #3
1,380
22
Last edited:
  • #4
19,919
4,095

Related Threads on Force reactions of balls in a tube

  • Last Post
2
Replies
28
Views
2K
Replies
8
Views
3K
Replies
9
Views
2K
Replies
2
Views
1K
  • Last Post
Replies
1
Views
1K
Replies
2
Views
18K
  • Last Post
Replies
2
Views
6K
Replies
21
Views
3K
Replies
13
Views
842
  • Last Post
Replies
1
Views
7K
Top