Introduction
Chapter Name : Direct And Inverse Proportions |
Sub Topic Code : 104_08_13_01_01 |
Topic Name : Introduction |
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Sub Topic Name : Introduction |
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Introduction
How are certain things related to each other?
Pre-Requisites:
Basic knowledge about proportions
Activity:
The amount of force used to push the piston of the cycle pump is directly proportional to the speed of the air coming out.
Real Life Question:
How much time will it take ironman to reach stark tower if he increases his speed to Mach 2 from Washington?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Cycle pump | Take a cycle pump and ask the student to pump air with different speeds and observe the relation between the speed with which the air comes out and the speed of the piston. |
Real life uses :
Weighing instruments, Gas cylinders, petrol pumps, press, vehicles, air filling stations
Practical examples around us
| Examples | Explainations |
|---|---|
| Balance Air filling | In a physical balance, when a weight is placed in one tray, the other tray lifts up. The pressure of the air in a closed container is inversely proportional to the volume of the container. |
What you learn in Theory:
Two quantities are related to each other if the change in one quantity changes the other quantity as well.
What you learn in Practice:
When the piston of the cycle pump is pushed down slowly, the air coming out comes slowly. When the piston of the cycle pump is pushed down fast, the air coming out also comes fast.