define viscous force and viscosity long answer
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viscous force
The viscous force is the force between a body and a fluid (liquid or gas) moving past it, in a direction so as to oppose the flow of the fluid past the object. In particular, the force acts on the object in the direction in which the fluid is moving relative to it (and hence, opposite to the direction in which it is moving relative to the fluid).
Viscous force is an analogue in fluids of the force of friction.
viscosity
Viscosity is a measure of a fluid's resistance to flow. It describes the internal friction of a moving fluid. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction. A fluid with low viscosity flows easily because its molecular makeup results in very little friction when it is in motion.Gases also have viscosity, although it is a little harder to notice it in ordinary circumstances.
Answer:
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Viscous Force :
The viscous force is the force between a body and a fluid (liquid or gas) moving past it, in a direction so as to oppose the flow of the fluid past the object. Viscous force is an analogue in fluids of the force of friction.
Viscosity :
definitions. Informally, viscosity is the quantity that describes a fluid's resistance to flow. The more usual form of this relationship, called Newton's equation , states that the resulting shear of a fluid is directly proportional to the force applied and inversely proportional to its viscosity.
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