Work
Chapter Name : Work And Energy |
Sub Topic Code : 101_09_11_01_02 |
Topic Name : Work |
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Sub Topic Name : Scientific Conception Of Work |
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Introduction
? What is work? ? How do you define work in physics?
Pre-Requisites:
Work , how we imply work in day to day life
Activity:
Develop a knowledge of how work is defined conceptually Detailed understanding on applications of work.
Real Life Question:
? A waiter carries a tray full of meals above his head by one arm straight across the room at constant speed. Does he do any work here? if so explain:- ? A book falls off a table and free falls to the ground. Is any work done here?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| work Condition for work to be done | Force acting on an object causing displacement. Object should move and force should act on it. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| A heavy box and a rope | Tie the rope to the box tightly and try pulling it. If the box moves from its original position it shows that work is done and the distance moved is the displacement |
Real life uses :
Work is done in our day to day life. It exists in all our actions without which existence is not possible.
Practical examples around us
| Examples | Explainations |
|---|---|
| by walking, dropping a box | When you walk from one point to another work is done because you carry yourself over a distance. |
What you learn in Theory:
Work , force applied on objects
What you learn in Practice:
Differentiate work in day to day life