Determination of Grease Viscosity Using Sliding Block Experiment

In summary, the viscosity of the grease can be calculated using the formula F/A = (n x delta v)/delta x, where the mass of the smaller block is 0.15 kg, the area of contact is 8x10^-4 metres squared, and the smaller block slides down 5 mm in 2 weeks. The calculated value for viscosity is 9.07x10^5 Pa.s.
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Louisa88
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Homework Statement


A small block is attached on the left of a larger block by a thin layer of grease, 2 micrometres (10^-6) thick. The mass of the smaller block is 0.15 kg and the area of contact is 8x10^-4 metres squared. If the smaller block slides down 5 mm in 2 weeks, calculate the viscosity of the grease. ANSWER: 9.07x10^5 Pa.s


Homework Equations


A formula which may help is Force/Area = Viscosity(change in velocity)/distances between areas of contact F/A = (n x delta v)/delta x



The Attempt at a Solution


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That looks like the right equation. Try plugging in the information you are given.
 

Related to Determination of Grease Viscosity Using Sliding Block Experiment

What is a real fluid?

A real fluid is a substance that has a definite volume and can flow, such as water, oil, or air. It is different from an ideal fluid, which is a hypothetical substance that has no viscosity or internal friction.

What is the difference between a real fluid and an ideal fluid?

The main difference between a real fluid and an ideal fluid is that a real fluid has viscosity, which means it resists flow and creates internal friction. An ideal fluid has no viscosity and does not experience internal friction.

What is viscosity in real fluids?

Viscosity is the measure of a fluid's resistance to flow. It is caused by the internal friction between the molecules of the fluid. High viscosity fluids, such as honey, flow slowly, while low viscosity fluids, such as water, flow more easily.

What is Bernoulli's principle?

Bernoulli's principle states that in a fluid flow, an increase in the speed of the fluid results in a decrease in its pressure. This principle is based on the conservation of energy and is used to explain the lift force on airplane wings and the flow of fluids through pipes.

How is fluid pressure calculated?

Fluid pressure is calculated using the formula P = F/A, where P is pressure, F is force, and A is the area over which the force is applied. In real fluids, pressure can also be affected by the fluid's density and velocity.

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