Thrust And Pressure
Chapter Name : Gravitation |
Sub Topic Code : 101_09_10_05_01 |
Topic Name : Thrust And Pressure |
|
Sub Topic Name : Thrust And Pressure |
|
Introduction
The effect of force on the body it acts also depends on the area over which it acts. The force acting per unit area is called PRESSURE. Sharp edges of knife impart greater pressure and wide wheels decrease the pressure.
Pre-Requisites:
Force
Activity:
Observe that when you stand on sand you sink in, but when you lie on it, you don’t. This is because pressure is far less in the second case.
Real Life Question:
Why do knives have a sharp edge? Why do lorries have wide wheels? How can a camel run in the dessert?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Pressure | Force per unit area |
| Thrust | Net force in a particular direction |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Real life uses :
Thrust and Pressure is taken in to consideration when designing buildings aircrafts, cars, lorries etc
Places to visit :
Aeronautical Museums have models on how airplanes can handle pressure and thrust
Practical examples around us
| Examples | Explainations |
|---|---|
| Wide wheels of lorries, sharp edges of knives, hydraulic pumps | All these examples are constructed either to increase or decrease the pressure, as is the requirement. The net effect is to reduce the force being applied. |
What you learn in Theory:
Theoretical meaning of pressure and thrust and the factors effecting them.
What you learn in Practice:
The applications of thrust and pressure and achieving desirable output by varying the dependent parameters (like area) to obtain the best desired output.