Gravitation
Chapter Name : Gravitation |
Sub Topic Code : 101_09_10_01_02 |
Topic Name : Gravitation |
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Sub Topic Name : Universal Law Of Gravitation |
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Introduction
Discuss about the attraction between objects
Pre-Requisites:
Forces, Introduction to Gravitation
Activity:
Go to the beach, observe the high and low tide. Then investigate how gravity and the moon affect tides.
Real Life Question:
Does the Earth pull the moon? if yes, why is the moon not falling on Earth?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Universal Law of Gravitation | The force of attraction b/w two objects is proportional to the product of their masses, and inversely proportional to the square of the distance in-between them. |
| Universal Gravitation Constant | G = 6.673 x 10-11 N m2 kg-2 |
| Mass | Amount of matter |
| Force | Force = mass x acceleration; push or pull |
| Gravity | Force that attracts you to Earth. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Solar System Model | Similarly for all planets/objects in the universe |
| Solar System Model | Similarly for all planets/objects in the universe |
| Globe & Moon Model | Elaborate on the force b/w earth and moon |
Real life uses :
Discuss the existence of the universe – gravity holds the universe together: prevents planets merging with blackholes
Places to visit :
Planetarium
Practical examples around us
| Examples | Explainations |
|---|---|
| Moon and Earth | Earth and Moon are in Orbit |
What you learn in Theory:
The formulae – Universal Law of Gravity
What you learn in Practice:
The use of the law, its relevance in astronomy