Question

What is fluid friction? Write the factors on which fluid friction depends?

Answer 1

1. Fluids are substances that can flow on the application of force or pressure on them. Gases and liquids are fluids.
2. The force of friction exerted by the fluids on the object moving through them is called fluid friction. The frictional force exerted by fluids is also called drag. Air resistance and viscous friction are the two commonly experienced fluid friction.
3. Air resistance is a form of friction that acts to slow down any object moving in the air. Similarly, the resistance offered by the liquids to the motion of the object moving through them is called viscous friction.

Factors that affect fluid friction are:

The fluid friction (air resistance or viscous friction) on an object moving in a fluid depends on

1. Speed of the object in the fluid: The faster an object. The faster an object fluid moves in a fluid, the greater the friction acting on it.
2. Shape of the object moving in the fluid: For example, a piece of paper crumpled into a ball falls faster than a flat piece of paper falls. Here, the force of friction on the flat piece of paper is more than the piece of paper crumpled into a ball.
3. Nature of the fluid: A given object experiences different amounts of friction in different fluids. An object moving at a certain speed experiences greater friction in water than that experienced in air