The SI unit of the coefficient of viscosity is
Correct answer: B. kg m^-1s^-1
- A. kgm^-1 s
- B. kg m^-1s^-1
- C. kgms^-1
- D. kg² m^-2s^-2
Explanation
The SI unit of the coefficient of viscosity, also known as dynamic viscosity, is expressed in kg m^-1s^-1. This unit represents the force per unit area required to maintain a unit velocity gradient between two parallel layers of fluid separated by a unit distance.
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Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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