Blocks of mass m_1 and m_2 are connected by a massless string that passes over the pulley in the figure (Intro 1 figure) . The pulley turns on frictionless bearings, and mass m_1 slides on a horizontal, frictionless surface. Mass m_2 is released while the blocks are at rest.
I figured out A and B.
A. Assume the pulley is massless. Find the acceleration of m_1.
B. Find the tension in the string.
C. Suppose the pulley has mass m_p and radius R. Find the acceleration of m_1. Verify that your answers agree with part A if you set m_p=0.
D. Find the tension in the upper portion of the string. Verify that your answers agree with part B if you set m_p=0.
E.Find the tension in the lower portions of the string. Verify that your answers agree with part B if you set m_p=0.
torque net=sum of all forces
The Attempt at a Solution
I know that the tensions change because of the mass and radius of the pulley, but I don't know what it does. I made a FBD, but I don't know what to do with my equations... I don't get it.