Circular motion: ring on string

AI Thread Summary
The discussion centers on solving a physics problem related to circular motion involving a ring on a string. Participants are addressing the calculation of forces acting on the ring, specifically the relationship between tension, gravitational force, and the angle of inclination. A key point raised is the correct expression for the forces in the y-axis, which should include both the tension and the cosine component. The confusion about the constant of half in the tangent equation is clarified through collaborative problem-solving. Ultimately, the participants successfully arrive at the correct understanding of the forces involved.
Faiq
Messages
347
Reaction score
16

Homework Statement


4c84ed5f4c844877969b916c48f467f0.jpg

Homework Equations


F = mw^2r
[/B]

The Attempt at a Solution


For part a, I can't get the constant of half with the tan a
I am getting tan a = w^2l/g
 
  • Like
Likes Delta2
Physics news on Phys.org
Post your work. What force do you use to compensate ##mg## ?
 
Faiq said:
For part a, I can't get the constant of half with the tan a
I am getting tan a = w^2l/g
Show how you got that.
 
Think carefully what is the total force acting in the y-axis on the ring. Its not ##T\cos{a}-mg## as you probably think. It is rather ##T(1+\cos{a})-mg## (why??)
 
I did it thanks guys
 
  • Like
Likes BvU

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Vertical circular motion
Replies
8
Views
2K
Troubleshooting Circular Motion: Solving the Toy Car Loop Puzzle
Replies
8
Views
1K
Tension of string acting on stone moving in horizontal circular motion
Replies
19
Views
3K
Acceleration in uniform circular motion is uniform or non-uniform?
2
Replies
55
Views
3K
The advisory speed for a car on a sloped bend
Replies
11
Views
3K
A hanging ring carrying current in a uniform magnetic field
Replies
10
Views
312
Relation between the velocity vector and the acceleration vector of an object
Replies
1
Views
643
What happens to the angle of a circular ring as temperature increases?
Replies
5
Views
2K
Magnetic field due to a straight wire and circular arc
Replies
20
Views
3K
Which powers works on bead on a string?
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top