Another rotation problem -- Acceleration of a ring rolling on a surface

  • Thread starter Thread starter palaphys
  • Start date Start date
Click For Summary
The discussion centers on a physics problem involving a rotating ring on a surface, specifically analyzing the acceleration of the center, the frictional force from the ground, and the normal reaction when the ring's geometric center has a velocity of $$ \sqrt{gR} $$. Participants are encouraged to provide their attempts at solving the problem to facilitate guidance. The conversation emphasizes the importance of showing work to receive constructive feedback. The thread also references a related discussion for additional context.
palaphys
Messages
266
Reaction score
17
[Mentors' note - this question was spun off from https://www.physicsforums.com/threa...urface-but-with-a-twist.1078618/#post-7243282 which contains the homework template information]

I'm not sure if I can add on by adding a similar question, if I am not allowed someone please tell me.

A ring is rotating as shown in the figure. At that particular instant when the velocity of the geometric center is $$ \sqrt{gR} $$ find the
1. Acceleration of center
2. Frictional force from ground
3. Normal reaction
 

Attachments

  • Screenshot_20250217-184445.png
    Screenshot_20250217-184445.png
    18.2 KB · Views: 57
Last edited by a moderator:
Physics news on Phys.org
palaphys said:
[Mentors' note - this question was spun off from https://www.physicsforums.com/threa...urface-but-with-a-twist.1078618/#post-7243282 which contains the homework template information]

I'm not sure if I can add on by adding a similar question, if I am not allowed someone please tell me.

A ring is rotating as shown in the figure. At that particular instant when the velocity of the geometric center is $$ \sqrt{gR} $$ find the
1. Acceleration of center
2. Frictional force from ground
3. Normal reaction
Where is your attempt?
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
View full post »

Similar threads

Rotating ring on a rough surface- but with a twist
  • · Replies 151 ·
6
Replies
151
Views
5K
Difficult problem in Rotational Mechanics JEE 2017 Comprehension paper
  • · Replies 1 ·
Replies
1
Views
1K
Why is the direction of kinetic/static friction up a ramp?
  • · Replies 7 ·
Replies
7
Views
1K
Rolling on a plank which is resting on friction less surface
  • · Replies 12 ·
Replies
12
Views
3K
Ring and solid sphere rolling down an incline - rotation problem
  • · Replies 8 ·
Replies
8
Views
3K
Acceleration of system related to rolling motion and pulley
  • · Replies 35 ·
2
Replies
35
Views
5K
How can we model a rolling truck on an incline using rotational motion analysis?
  • · Replies 24 ·
Replies
24
Views
3K
Friction Required for Billiard Ball to Roll without Slipping
  • · Replies 60 ·
3
Replies
60
Views
4K
How Does Roughness Affect the Time Period of a Ball Rolling on a Vertical Hoop?
  • · Replies 1 ·
Replies
1
Views
1K
Rolling without slipping problem
  • · Replies 42 ·
2
Replies
42
Views
3K