Two weights m₁-2 kg and m2=1 kg are linked by a thread and thrown over a pulley weighing M-1 kg. Find: (I) the acceleration with which the weights move, (2) the tensions T, and T2, of the threads which the weights are attached to. Consider the pulley as a homogeneous disk. Disregard friction.​

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system