(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

the problem statement is in the pic.

2. Relevant equations

inertia for cylinder shape= m*r^2*1/2

torque=F*"length

sum of torque= "inertia" * "angular acceleration"

w=mg

3. The attempt at a solution

i was thinking that the weight forces of the masses times the length would give me the individual torques. i converted the cm to m to stay in SI units. having the counterclockwise as my positive direction i set up my equation:

(9.8m/s^2*1kg*.1m) + (9.8m/s^2*4.9kg*.1m)= 1/2*4kg*.1m^2* "angular acceleration".

i got "angular acceleration" = 191.1 rad/s^2. i entered this into the computer and i confirmed that it was wrong.

i was thinking that maybe i needed to use the 2 different tension forces in place of the gravitational forces that i used in my torque equation. but in that case i end up with an equation with 3 unknowns. so i'm not sure what to do?

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# Homework Help: Torque pulley problem

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