Viscosity
The measure of the resistance of a fluid to flow is known as viscosity. Most fluids have some resistance to motion, the resistance provided by the fluid is called viscosity. This resistance is created by the force of attraction between the fluid molecules. If you pour water through a funnel, it flows easily and quickly, because it has very little resistance. But if you pour honey through a funnel, it may take a little time longer, as the density of honey is high.
Poiseuille's Law
The law of Poiseuille or Poiseuille's equation states that the pressure drop of an incompressible fluid especially a liquid in a laminar flow that passes through a cylindrical tube of length L, radius r, pressure gradient ΔP, and mainly depends on the viscosity of the fluid is nothing but the pressure difference of the layers of fluids. ΔP=P1-P2
Drag Forces
Forces that occur due to the movement of fluid are known as fluid mechanics. Following are the fluids present:
1.A block with a mass of 20 kg and a block with a mass of 30 kg were connected by a negligible thread and placed over a pulley on the edge of the slope as shown. The 30 kg block was attached to a horizontal surface with a light enough to ignore the mass of the water constant k = 3000 N/m. Currently, the spring is holding a block of mass of 30kg to prevent compression, so the spring maintains its equilibrium position at the length of the figure (20cm). The 20kg block is now pulled down the slope by 20cm (the spring will increase by 20cm and the 30kg block will be located 40cm above the floor). If left still, what would be the speed at which a block of 30kg would pass a height of 20cm from the floor? However, there is no friction between the 20 kg block and the slope.
???m/s
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