The block of ice (temperature 0∘C) shown in the figure below is drawn over a level surface lubricated by a layer of water 0.10 mm thick. Determine the magnitude of the force F→ (in N ) needed to pull the block with a constant speed of 0.45 m/s. At 0∘C, the viscosity of water has the value η = 1.79×10−3 N⋅s/m2. N