Fluid Friction
Chapter Name : Friction |
Sub Topic Code : 101_08_12_06_01 |
Topic Name : Fluid Friction |
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Sub Topic Name : Fluid Friction |
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Introduction
Recap on what are fluids and how their properties effect friction and what is frictional force
Pre-Requisites:
Fluids and its properties, Friction
Activity:
When you drop a lead ball first in a column filled with viscous oil and then in a column filled with water, you can see that the velocity of the ball is much lower in the oil column than in water column. The gravity for is same for both, but frictional force is greater in oil column than water column.
Real Life Question:
An iron ball travels same distance faster through air than a beaker of oil. What is the difference although the gravity pulling it is the same.
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Drag | The frictional force exerted by fluids is called drag. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Glass column filled with viscous oil and lead ball | Observe how the speed is different with air and oil. |
Real life uses :
Aero modelling, Racing cars, Submarines
Places to visit :
School Physics Lab, Science Museum, Petroleum and Automobile Industry (a brief explanation of what observations can be made in these places shall be more helpful)
Practical examples around us
| Examples | Explainations |
|---|---|
| Submarinee, Ships, Aircrafts etc | These are designed considering the drag force exerted by the surrounding fluid |
| Petroleum & Automobile Industry | Oil and Car companies use multiple fluid dynamics techniques in their research for more efficient cars and engines |
What you learn in Theory:
How the fluids exert the friction on the objects moving through them.
What you learn in Practice:
Depending on the viscosity different fluids can be chosen to meet the need.