I do remember you folks to like to see where I left things. Well, let's change the arrangement. Give me formula and I will do the rest. A hydraulics lift (type commonly used for greasing automobile) consist of a 10.111-in-diameter ram that slides in a 10.006-in-diameter cylinder. The annual space being filled with oil having a kinematic viscocity of 0.0038 ft^2/sec and specific gravity of 0.83. If the rate of travel of the ram v is 0.5fps, find the frictional resistance, F when 6ft of the ram is engaged in the cylinder...... I think this is simply evaluating expression problem once the expression is known to me. Am I underestimating the question?