Question

Figure (5-E21) shows a man of mass 60 kg standing on a light weighing machine kept in a box of mass 30 kg. The box is hanging from a pulley fixed to the ceiling through a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, what is the weight shown by the machine ? What force should he exert on the rope to get his correct weight on the machine ?

Answer 1

(ii) To get his correct weight suppose the applied force is ‘T’ and so, acclerates upward with ‘a’. In this case, given that correct weight = R = 60g, where g = accⁿ due to gravity