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Unformatted text preview: trying to reduce the sliding.
The drag is proportional to the speed and the
length of pipe. Fdrag = 8πµLv Physics 122 Dr. Nick Cummings 4 Physics 142 7/26/2011 Implication: Pressure drop
If we have a fluid moving at a constant rate
and there is drag, N2 tells us there must be
another force to balance the drag.
The internal pressure in the fluid must drop
in the direction of the flow to balance drag.
Flow in Flow out
Pressure force Pressure force
downstream Dr. Nick Cummings 5...
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