I just need help with parts c and d

Question 2 - Based on P16.27, Mott (25 marks) The figure (below) shows a device for clearing debris using a jet of air discharged from a nozzle. As shown, the jet is striking a cube-shaped object (density 1900kg/m3 ) sitting on the floor. Assume that in all cases that (i) the entire jet is deflected by the cube; and (ii) the cube slides rather than tumbles. (a) If the jet diameter is 38mm and the air velocity is 25m/s, what is the heaviest cube that could be moved? What are the dimensions of the cube? If needed, assume the coefficient of friction is 0.60. (b) If the jet diameter is 19mm but a water jet at velocity 5m/s is used (instead of air), what is the heaviest cube that could be moved? What are the dimensions of the cube? If needed, assume the coefficient of friction is 0.60. (c) If the water jet and cube from Part (b) are used here, but the cube is separated from the floor by a thin layer of canola oil (Newtonian: =915kg/m3;=84mPa.s ), at what steady-state velocity will be cube move? Assume the layer of canola oil separating the cube from the floor is 0.3mm thick. (d) If the water jet and cube from Part (b) are used here, but the cube is separated from the floor by a thin layer of ketchup (Bingham: =1150kg/m3;y=21Pa;p=30mPa.s ), at what steadystate velocity will be cube move? Assume the layer of ketchup separating the cube from the floor is 0.3mm thick. Question 2 - Based on P16.27, Mott (25 marks) The figure (below) shows a device for clearing debris using a jet of air discharged from a nozzle. As shown, the jet is striking a cube-shaped object (density 1900kg/m3 ) sitting on the floor. Assume that in all cases that (i) the entire jet is deflected by the cube; and (ii) the cube slides rather than tumbles. (a) If the jet diameter is 38mm and the air velocity is 25m/s, what is the heaviest cube that could be moved? What are the dimensions of the cube? If needed, assume the coefficient of friction is 0.60. (b) If the jet diameter is 19mm but a water jet at velocity 5m/s is used (instead of air), what is the heaviest cube that could be moved? What are the dimensions of the cube? If needed, assume the coefficient of friction is 0.60. (c) If the water jet and cube from Part (b) are used here, but the cube is separated from the floor by a thin layer of canola oil (Newtonian: =915kg/m3;=84mPa.s ), at what steady-state velocity will be cube move? Assume the layer of canola oil separating the cube from the floor is 0.3mm thick. (d) If the water jet and cube from Part (b) are used here, but the cube is separated from the floor by a thin layer of ketchup (Bingham: =1150kg/m3;y=21Pa;p=30mPa.s ), at what steadystate velocity will be cube move? Assume the layer of ketchup separating the cube from the floor is 0.3mm thick