Thrust And Pressure
Chapter Name : Gravitation |
Sub Topic Code : 101_09_10_05_03 |
Topic Name : Thrust And Pressure |
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Sub Topic Name : Buoyancy |
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Introduction
When an body is immersed in a fluid, the fluid particles exert an upward force (Buoyant force) on the body while the gravity acts downwards. These 2 forces are responsible for the body to float or sink. The buoyant force depends on the relative density of the fluid and the body.
Pre-Requisites:
Force, Gravity, fluid thrust and pressure, density of fluids
Activity:
When you are in a swimming pool and try sitting down by folding you legs, you feel a force pushing you up.
Real Life Question:
In dead sea. its said that you will not sink but float on water. What makes objects to float or sink when immersed in a fluid?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Density | Mass per unit volume |
| Buoyant Force | Upward force exerted by any liquid on an object immersed in it. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Empty bottle and a bucket of water | Observe the force dynamics when an bottle floats and is pushed down in water |
Real life uses :
Boats and Ships
Places to visit :
Shipping Industry, Science Museums
Practical examples around us
| Examples | Explainations |
|---|---|
| Ships, Boats, Swimming | All are possible only because buoyant force exists. |
What you learn in Theory:
The existence of a buoyant force and how it acts.
What you learn in Practice:
The applications of this force in many mechanical applications like Ship building, submarines etc.