Work Done By A Variable Force
Chapter Name : Work, Energy And Power |
Sub Topic Code : 101_11_06_05_01 |
Topic Name : Work Done By A Variable Force |
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Sub Topic Name : Work Done By A Variable Force |
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Introduction
Energy is an indirectly observed quantity which comes in many forms, such as kinetic energy, potential energy, radiant energy, and many others; which are listed in this summary article.
Pre-Requisites:
Energy
Activity:
Generator.
Real Life Question:
What is the unit of work done?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Work | A force is said to do work when it acts on a body so that there is a displacement of the point of application, however small, in the direction of the force. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Electric generator | A device that converts mechanical energy to electrical energy. |
Real life uses :
To produce energy.
Places to visit :
Steam engine.
Practical examples around us
| Examples | Explainations |
|---|---|
| Generators | Generators provide nearly all of the power for electric power grids. |
What you learn in Theory:
The basic work relationship W=Fx is a special case which applies only to constant force along a straight line.
What you learn in Practice:
If the force and displacement are not in exactly the same direction, one must take the dot product within the integral.