Friction due to Liquids and Gases
Friction due to Liquids and Gases: Overview
This topic covers concepts, such as, Fluid Friction, Methods to Minimise Fluid Friction, Energy Loss Due to Friction & Factors Affecting Fluid Friction etc.
Important Questions on Friction due to Liquids and Gases
What is the energy lost due to friction?
During friction the energy “lost” by the object exactly equals the _____ gained by the object and its surroundings.
Fluid friction on an object in a fluid depends on its speed with respect to fluid.
Frictional force on an object in a fluid depends on the nature of the fluid.
Frictional force on an object in a fluid depends on the shape of the object
Which of these factors affect fluid friction.
When a machine is operated, the _____ generated causes wastage of energy.
Explain why vehicles are designed to have a specific shape.
Objects moving in fluids does not require a specific shape.
Write the name of the shape of aeroplane for minimising friction.
(Choose from: Streamlined shape/spherical shape)
What is fluid friction? Write the factors on which fluid friction depends.
Streamlining reduces friction.
Bodies of birds and fishes are _____ shape.
Why the shape of an aeroplane is like a bird?
