1. The double Atwood machine shown in Fig. 4-48 has frictionless, massless pulleys and cords….

1. The double Atwood machine shown in Fig.
4-48 has frictionless, massless pulleys and cords. Determine (a) the
acceleration of masses mA, mB, and mc, and (b)
the tensions FTA and FTC in the cords.

FIGURE 4-48

2. Determine a formula for the magnitude of
the force  exerted on the large block (mc) in Fig. 4-51 so that the
mass mA does not move relative to mc. Ignore all
friction. Assume mB does not make contact with mc.