A steel ball is used to measure the viscosity of motor oil. The container used in this experiment has a bottom area of 20 cm2 The steel ball is 3 mm in diameter. After the ball is dropped to the container it takes about 12 seconds to reach to the bottom of the container whose height is 60 cm. Calculate the viscosity of the motor oil. b) What assumptions did you make in finding the viscosity of the motor oil?
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:
a) A steel ball is used to measure the viscosity of motor oil. The container used in this experiment has a bottom area of 20 cm2 The steel ball is 3 mm in diameter. After the ball is dropped to the container it takes about 12 seconds to reach to the bottom of the container whose height is 60 cm. Calculate the viscosity of the motor oil.
b) What assumptions did you make in finding the viscosity of the motor oil?
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