Gravitation
Chapter Name : Gravitation |
Sub Topic Code : 101_09_10_01_01 |
Topic Name : Gravitation |
|
Sub Topic Name : Gravitation |
|
Introduction
Discuss “What goes up must come down”
Pre-Requisites:
Introduction to Forces
Activity:
“Defy Gravity”: Take a glass filled with water Now place a piece of cardboard over the mouth of the glass. Holding the cardboard, turn the glass upside down.You will see the cardboard nor the water will fall. Try to explain why it happens.
Real Life Question:
“Why do things fall?”, “Why aren’t we floating?”, “Why do things/we flat in space?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Force of Attraction | Objects under the influence of this force moves towards each other. |
| Centripetal Force | A force experienced by an object in circular motion, it is towards the center of rotation |
| Acceleration | The rate of change of velocity |
| Speed | Distance travelled divided by time taken |
| Velocity | The speed of something in a given direction. |
| Gravity, Force | A Force that attracts you towards the center of the Earth; A Force – Push or Pull |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Nitrogen balloon | (What's with the balloon) |
| Objects under the influence of this force moves towards each other. | *Demonstrate earths gravitational field (Explain) |
Real life uses :
http://www.guardian.co.uk/education/2004/jun/24/research.highereducation2
Places to visit :
Many children’s science museums have a set-up dedicated to gravitation.
Practical examples around us
| Examples | Explainations |
|---|---|
| Objects falling down | This is due to the gravitational full of the earth. |
| Ocean Tides | Both the Earth and the Moon have a gravitational pull – this results in Ocean tide formation. |
What you learn in Theory:
The existence of a force of attraction (gravitational force)
What you learn in Practice:
How gravity effects every single object around us.