Recent content by ForceFail

I see, multiplied equation 1 by R(lw) and equation 2 by R and added them. Then Tu and Tl cancel and you can solve for a. Got the right answer Thanks.

So for the smaller wheel: tr+(Tl)R-(Tu)R=I(alpha) Larger wheel gives: (Tu)(Rlw)-(Tl)(Rlw)=I(alpha) So now I have 2 equations and four unknowns. t,(Tl),(Tu),(alpha) I can write t=mg-ma and alpha as a/r, Does alpha = a/r for the small wheel use the smaller or larger radius? Since its a...

Homework Statement http://imgur.com/eYoa8Ut Homework Equations Torque=rt=I(alpha) t-mg=-ma alpha = a/r The Attempt at a Solution t-mg=-ma is the equation for the hanging mass. To find how much this turns the small wheel, rt=I(alpha) I and r are known rt=Ia/r I'm not sure what to do from...