The velocity' of block A is 6 ft/s to the right at the instant when r = 2.4 ft and θ =...

The velocity' of block A is 6 ft/s to the right at the instant when r = 2.4 ft and θ = 30°. Neglecting the mass of the pulley and the effect of friction in the pulley and between block A and the horizontal surface, determine, at this instant,(a) the tension in the cable, (b) the acceleration of block A, (c) the acceleration of block B.

Fig. P12.75