I think I know what you are saying now.
Net Torque=T2*R-T1*R
Right?
But I have no idea how to find the force of each tension so I don't know how to find their respective torques
Net Torque equation is Force*radius=Inertia*alpha
Inertia for a disk is 1/2MR^2 and because there is no slipping a=r*alpha which means alpha=a/r, so:
1/2MR^2*a/R=T*R
The R's cancel out leaving 1/2Ma=T
Plug the info in and you have .5*4*a=T
That is how I got that but I created this thread because...
1.
The mb = 25 kg block is 2 m above the ledge. The pulley is a uniform disk with a radius of 10 cm and mass m = 4 kg.
2. (a) Find the speed of the 25 kg block just before it hits the ledge.
(b) Find the angular speed of the pulley at that time.
(c) Find the tensions in the strings.
(d) Find...