physics about force

1.(a) Since the window washer is moving up at constant speed, the tension in the rope equals to her weight plus that of the bucket.
Thus, the pulling force = tension in the rope = 65g N = 650 N
(take g, the acceleration due to gravity, equals to 10 m/s2)

(b) If the force is increased by 10%, the extra force = 650 x 0.1 N = 65 N
Thus, using net-force = mass x acceleration
65 = 65a, where a is the acceleration
a = 1 m/s2