A block weighing 143kg is overlaid with a steel weight 10kg.the block is lowered to a height of 20cm using a winch inextensible rope tied to 10 degrees wedge resting on horizontal surface.the block is supported by a vertical wall as shown below.the coefficient of friction btwn the wall and block is µ 0.3 and that btwn the wedge and horizontal surface is 0.25.find the tension in rope required to lower the block