Torque require to rotate ball

I want to calculate the torque required to rotate a ball.
1. Ball is solid having mass M kg.
2. Ball is bored through about its axis.
3. Ball is rotating about the axis XX

Please see attached file.
 

Attachments

Last edited:
You must find the moment of inertia of a hollow cylinder which is,
[tex]I=1/2 m ( r_i^2 + r_0^2) [/tex]
r_i and the r_0 are radial distances from centre.

Than the relationship between torque, moment of intertia and angular acceleration, which is,
[tex]T=I \alpha [/tex]

Now looking at the picture im not sure if ur including those caps on the top and bottom. In which case you must find their moment of intertia and add it to the cylinder
 
Right side view is a section of a ball. The hatching part is a solid part of ball.When you will cut the ball in left view in middle then by looking left side it will look like in right view.
 
Not sure I completely understand what your saying. Are the equations what you are after? Just find the moment of inertia of the top and bottom parts, if indeed Im understanding you correctly
 

Related Threads for: Torque require to rotate ball

Replies
19
Views
16K
Replies
0
Views
3K
  • Posted
Replies
2
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top