# Can someone help me with this friction force question?

Determine the friction force, Fs, for a flat plate length 13.8 cm and width 3.1 m being towed in a water tank at velocity 1.5 m/s. Assume water density and viscosity of 1000 kg/m3 and 1 × 10^-3 kg/(ms) respectively

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- billrussell42Lv 72 months ago
I think you mean drag force. question, is this high speed turbulent flow or laminar flow?

what is the orientation of the plate? sldeways, you need the thickness.

force of drag for high speed turbulent flowFd = ½ρv²ACd in Newtonsρ is the density of the fluid in kg/m³ (for air it is 1.293 kg/m³ at 0°C)v is the speed of the object relative to the fluid in m/sA is the reference area in m² (πr² for a sphere)Cd is the drag coefficient (0.47 for a sphere)

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