b) A uniform cupboard of mass 100 kg is pulled through the inclined surface of negligible friction as shown in Figure Q3(b) where the mass of the pulley and the cable as well as their frictions are negligible. If the height his too high, the cupboard may tip forward and if it is too low, it may tip backward. Determine, immediately after the system is released from rest: the free body diagram of the cupboard A and block B, i) ii) the acocloration of the 160-kg block D, iii) the tension in the cable, and iv) the range of h so that the cupboard will not tip. (15 marks) 1 m 100 kg 3 m A =tan (3/4) Figure Q3(b) 160 kg B