1.1. A small lift car with an empty mass of 250 kg is being raised vertically by means of a light inextensible cable attached to its top.  Inside the lift car is a horizontal wooden tabletop B with mass 3 kg, which has been connected to the floor of the lift car by a light  vertical rod.  On top of B is a light wire frame from which hangs a metal sphere A of mass 50 g, supported by a light inextensible string attached to the top of the frame.  This situation is depicted in the diagram below:

Starting from rest, the lift car is accelerated upwards with a constant acceleration of magnitude a.

Given that the thrust in the rod connecting B to the floor of the lift car is 35.38 N, find:

the tension in the string connecting A to the wire frame

1.2. the tension in the lift cable

1.3. the distance that the lift car ascends in its first 3 seconds of motion.