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4.7. Atwood’s 2, , Consider the Atwood’s, machine shown in Fig. 4.18., Masses of m and 2m lie ona, frictionless table, connected, by a string that passes around, a pulley. The pulley is, connected to another mass of, 2m that hangs down over, another pulley, as shown., Find the accelerations of all, three masses., , (top view), , (side view), 2m, 2m, , Figure 4.18