Anewtonian, incompressible fluid fills a gap of height, h, between two flat plates. the plates are of width, w and length, l. the top plate moves to the right with a velocity of v. what is the force required to move the plate at this velocity? assume the process occurs at steady state. repeat the problem for a bingham plastic to determine the minimum velocity, v, as a function of other parameters required for flovw between the plates. also, calculate the force at this velocity. assume the flat plates are your teeth and a tooth brush, respectively, and that tooth paste acts like a bingham plastic. if the yield stress for toothpaste of 100 pa with a viscosity of 100 cp, calculate the minimum velocity and force at this velocity. make reasonable assumptions for h, w, l.]