I Question regarding finding the magnitude of Torque

  • I
  • Thread starter Thread starter Harikesh_33
  • Start date Start date
  • Tags Tags
    Magnitude Torque
AI Thread Summary
The discussion focuses on calculating the torque of a system with two masses attached to a rod, which is rotating at an angle θ from the vertical. The key point raised is the definition of the vector r, which is the distance from the pivot point to the mass. The thread was closed for moderation, emphasizing that schoolwork-related questions should be posted in designated Homework Help forums. Additionally, users are reminded to attach images directly rather than using temporary links. The conversation highlights the importance of proper forum etiquette and guidelines for posting academic questions.
Harikesh_33
Messages
24
Reaction score
4
User has been reminded to post schoolwork-type questions in the Homework Help forums, and to upload images here rather than just linking to them.
TL;DR Summary
https://imgur.com/a/JDUgrrZ

This is the question ,now there are two ways to approach this .

1)Using the formula τ=r×F .
2)Finding L and differentiating it.

Now I approached the problem with the first method .

Since the mass is moving along a circle of radius rsinθ,the centripetal force is F=mrsinθω² ....(1)

https://imgur.com/a/nZogpVO. ...(A)

Here r is the vector from the centre of rod (which is stationery ) to the mass .

Angle between r and F is 90°+θ .

Therefore Torque τ is rFsin(90+
Question regarding finding the magnitude of Torque of a system of two masses attached to a rod rotating at angle of θ degrees with respect to a vertical
 
Physics news on Phys.org
What are you considering r to be?

FA00FD8A-D2E0-4177-A22F-1DA48C4F3A08.jpeg

89801AFC-3C1E-4396-89C9-73AB6CAE1462.jpeg
 
The vector from point through which the rod is rotating to the mass .

I have drawn r Vector in second image .
 
Thread closed for Moderation...
 
Thread will remain closed here. @Harikesh_33 -- Please check your PMs. Schoolwork-type questions (even if for self-study) must be posted in the Homework Help forums. Also, please do not just transitory imgur links to the images -- those can disappear which makes your thread make no sense. Please use the "Attach files" link below the Edit window instead. Thank you.
 
Thread 'Gauss' law seems to imply instantaneous electric field'

Thread 'Gauss' law seems to imply instantaneous electric field'

Imagine a charged sphere at the origin connected through an open switch to a vertical grounded wire. We wish to find an expression for the horizontal component of the electric field at a distance ##\mathbf{r}## from the sphere as it discharges. By using the Lorenz gauge condition: $$\nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial \phi}{\partial t}=0\tag{1}$$ we find the following retarded solutions to the Maxwell equations If we assume that...
View full post »

Thread 'Highway: Deriving speed from Doppler shift'

I passed a motorcycle on the highway going the opposite direction. I know I was doing 125/km/h. I estimated that the frequency of his motor dropped by an entire octave, so that's a doubling of the wavelength. My intuition is telling me that's extremely unlikely. I can't actually calculate how fast he was going with just that information, can I? It seems to me, I have to know the absolute frequency of one of those tones, either shifted up or down or unshifted, yes? I tried to mimic the...
View full post »

Similar threads

I How to quantify gyroscopic precession torque?
Replies
34
Views
3K
I How Does Torque Affect Balance on a Self-Balancing Electric Unicycle?
Replies
10
Views
3K
I Alternative Approach to Solving Foucault's Pendulum Behavior
Replies
8
Views
2K
I How do we calculate the energy we used to do something?
Replies
10
Views
2K
I Trying to calculate the net force/torque of a rock climber on a wall
Replies
4
Views
2K
I A Question About the Physical Explanation Behind Torque
Replies
8
Views
1K
B Sign conventions in torque and non-uniform circular motion
Replies
1
Views
1K
I Off center torque applied to a rotating body
Replies
4
Views
2K
B Work done when moving an object
Replies
7
Views
285
B Question about the definition of Torque Equilibrium
Replies
14
Views
781

Hot Threads

Recent Insights

Back
Top