What Torque is Needed to Accelerate a Phonograph Album?

  • Thread starter Thread starter Duely Cack
  • Start date Start date
  • Tags Tags
    Accelerate Torque
Click For Summary

Homework Help Overview

The discussion revolves around calculating the torque required to accelerate a phonograph album, specifically focusing on the parameters of mass, diameter, and angular acceleration. The subject area includes concepts of rotational dynamics and moment of inertia.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants discuss the relationship between torque, moment of inertia, and angular acceleration. There are attempts to clarify the formula T=Iα and its application to the problem. Some participants express confusion about the underlying concepts and the availability of resources for learning.

Discussion Status

The discussion includes a mix of guidance and expressions of frustration regarding the level of assistance provided. Some participants question the appropriateness of the help being offered, while others indicate that they find the information useful for progressing with their understanding.

Contextual Notes

One participant notes a lack of access to educational resources, such as a physics book, which may impact their ability to engage with the material independently. There is also mention of homework constraints that limit the types of examples provided by the teacher.

Duely Cack
Messages
7
Reaction score
0
1.How much torque is required to accelerate a phonograph album (75-g, 30-cm diameter 33.3 rpm) at 3-rad/sec2


2. T=I(alpha)



3. Sorry i have to idea on this one I am completely lost!
 
Physics news on Phys.org
[tex]\tau = I\alpha[/tex] as you stated.
You are given [tex]\alpha = 3 \theta s^{-1}[/tex]
So just multiply by moment of inertia.

Hint: For a disc it's [tex]I = \frac{1}{2}MR^2[/tex]
 
Rake, you are not helping here. The OP should know some of this stuff, or should at least know how to look it up. When you give out too much information you are helping students get their homework finished (you are doing it for them, for free), but you are not helping them learn.
 
Well the fact that I don't own a physics book and My teacher only gives us equations with variables for numbers and variables for more numbers and only gives examples of when used in real life. i would say that at least that is teaching me something thanks rake it helped me get that problem done on to the next one that was easy b/c of your help
 

Similar threads

Replies
15
Views
2K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 8 ·
Replies
8
Views
4K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 17 ·
Replies
17
Views
1K
  • · Replies 18 ·
Replies
18
Views
7K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K