QUESTÃO 1.60. IRODOV No arranjo da Figura 1.9, as massas mo, m1, e m2 dos corpos são iguais; asma

In the arrangement shown in Figure 1.9, the masses mo, m, and ma of the bodies are equal; the masses of the pulley and the strings are negligible, and there is no friction in the pulley. Find the acceleration w with which body mo descends and the tension in the string attached to bodies mi and ma, knowing that the coefficient of friction between these bodies and the horizontal surface is equal to k. Consider the possible cases.