1. The problem statement, all variables and given/known data A group of construction workers are building a house and want to lower down an excess bundle of 1400 kg bricks to ground. They tie one end of a rope to the bundle of bricks, loop it through a pulley, and tie the other end of the rope to a toolbox. If the coefficient of kinetic friction between the toolbox and the floor is 0.690 and the acceleration of the bundle of bricks is 4.56 m/s2, what is the mass of the toolbox? where A=toolbox and B=bricks 2. Relevant equations T-ukmBg=-mBaA T-mAg=mAaA (mA-ukmB)g=-(mA+mB)aA 3. The attempt at a solution mA = ((gukmB)-(amB))/(a+g) I tried to solve by using this rearranged formula but did not get the right answer. I'm not quite sure what I'm doing wrong or what I'm missing. I am also assuming that acceleration (4.56 m/s2) is uniform, is this a correct assumption.