Two boxes connected with a pulley, one hanging *updated* 1. The problem statement, all variables and given/known data There is a Mass (m1) on a table. The coefficient of friction between the table and m1 is 0.18. The second mass (m2) is hanging, suspended by a string around a pulley (m3) attached to m1. The pulley has a radius (R) and is considered a solid cylinder. m1=3.5[kg] m2=2.8[kg] m3=1.9[kg] R=0.089[m] Find: a) alpha of the pulley b.)Ft1 c.)Ft2 d.)omega @ (6.9) 2. Relevant equations I for solid cylinder = (1/2)M2R2 Fnet=ma Torquenet=I*alpha alpha=a/R 3. The attempt at a solution I drew a torque fbd for the pulley, I found I for the pulley, I drew fbd's for the boxes, got my equations like m1--> X) Ft1-Ff=m1a Y) Fn-Fg=0 Fn=m1g Ft1=m1a+Ff Ft1=m1a+Mew*m1*g m2---> Y) Ft2-Fg=m2(-a) Ft2=-m2a+m2g and finally Torquenet=I*alpha so Torque1=R*sin(90)*Ft1 = R*Ft1 (k) Torque2=R*sin(90)*Ft2 = R*Ft2 (-k) ==>R*Ft1-R*Ft2=I*alpha and alpha= a/R So R*(m1a+Mew*m1*g)-R*(-m2a+m2g)=((1/2)M3R2)*(a/R) That equation just has one uknown --> a For a i got 3.97[m/s2] For alpha I am getting like 44 [rads/s2] and others are getting about about 16 [rad/s2] Can someone spot what, if anything, I'm doing something wrong? EDIT: Sorry for the mistakes..