A Parallel Plate of Area 400 Cm² Is Dragged Over

Multiple Choice

A parallel plate of area 400 cm² is dragged over a 0.20 cm thick layer of oil at a speed of 30.0 cm/s. It takes a force 1.20 N applied to the plate to sustain this speed. What is the viscosity of the oil?

A) 6.00 kg/(m∙s)
B) 20.0 kg/(m∙s)
C) 60.0 kg/(m∙s)
D) 0.200 kg/(m∙s)
E) 200 kg/(m∙s)