Angular Acceleration

apaxapax

See attached

Homework Equations

Ok..Im having difficulty with this problem. I dont see what m has to do with angular accerleration.

The Attempt at a Solution

I believe the equation to use for this is a=rα ? I just cant get there..any help would be great

thanks

The Attempt at a Solution

Attachments

• Untitled.jpg
33.7 KB · Views: 344

Homework Helper

See attached

Homework Equations

Ok..Im having difficulty with this problem. I dont see what m has to do with angular accerleration.

The Attempt at a Solution

I believe the equation to use for this is a=rα ? I just cant get there..any help would be great

thanks

Well the tension would exert a torque, so what equation relates torque and angular acceleration?

apaxapax
ok..found an equation....guess I need to organize equations better..seems to be my big problems.
t=mr2α

that should do it I think..anyone like to confirm?

thanks

Mentor
t=mr2α

that should do it I think..anyone like to confirm?
Almost. The general equation that you need, as rock.freak was leading you towards, is:
Torque = I*alpha

What's I for a uniform disk?

apaxapax
I = 1/2mr2

Mentor
I = 1/2mr2
Good!

apaxapax
thanks for the help. much appreciated