Rolling Reel?

  • Thread starter ayoz
  • Start date
  • #1
ayoz
1
0
A string is wrapped around a reel. The reel is the set on a horizontal flat surface. This string is set perpendicularly to a surface and pulled. The reel starts to roll in the direction away from the string. However, as the angle between the reel string and the surface decreases, the velocity of the reel decreases, until it reaches an angle where it doesn't roll, but rather just slides. After the angle has been passed the reel starts rolling in the opposite direction, towards the string.

My question is, what causes this phenomenon? Why does the reel start moving in the opposite direction, and not just continue moving in the same direction?
 
Last edited:

Answers and Replies

  • #2
Simon Bridge
Science Advisor
Homework Helper
17,874
1,657
Welcome to PF;
It is a consequence of Newton's laws.
Try sketching out the situations and put the forces on.
 

Suggested for: Rolling Reel?

Replies
0
Views
5K
  • Last Post
Replies
3
Views
8K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
884
  • Last Post
Replies
7
Views
6K
  • Last Post
Replies
6
Views
3K
  • Last Post
Replies
4
Views
692
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
1K
Top