Okay so we can use the parallel axis thm to get the moment of inertia at the point of contact with the plane:
I = 1/2MR2 + MR2 = 3/2MR2
but then how do you use that to calculate torque?, I know that torque = I*alpha but we can't find alpha because there is no acceleration.
Homework Statement
The figure shows a cylinder of mass 3.5kg, radius 4.4cm and length 10.2cm with 105turns of wire wrapped around it lengthwise, so that the plane of the wire loop contains the axis of the cylinder. What is the least current which while flowing through the loop will prevent the...