STD – 6 th SUB – SCIENCE 9.Work and energy Force and work Relation between work and energy Measuring work Potential energy and kinetic energy

STD – 6th SUB – SCIENCE 9.Work and energy

Force and workRelation between work and energyMeasuring workPotential energy and kinetic energyForms of energyTransformation of energyThe electric motor and the dynamo Sources of energy –conventional sourcesSources of energy-non conventional sourcesBiofuels-BiodieselThe solar electric cell

Points to study

9.Work and Energy

Presented By -Panchal Amol



Force and workWork- when force is

applied and object is set in motion or the direction of an object

in motion is changed ,then work is said to be done.


Relation between work and energyEnergy – the capacity to do work is called energy When the displacement same, more work is done when more force is applied to do it For measuring we must consider the force applied as well as the displacement




Measuring work



Potential energy and kinetic energy

Potential energy – The stored up energy which has potential to do work is called potential energy .Ex.



Kinetic energy – The energy get to the moving body due to its motion is called kinetic energy. Every moving object has kinetic energy

Potential energy and kinetic energy


Forms of energyForms of energy – Heat,sound,light,chimical energy,magnetic energy ,electricity are the forms of energy .



Forms of energy



Transformation of energyTransformation of energy –Energy is never destroyedIt is converted from one form in to another e.g. kinetic energy convert into heat energy



Sources of energy –conventional sources

Two types of sources of energy 1. *Conventional sources -

Sources of energy which have been using for long time are called conventional sources of energy. e.g. petrol, diesel , coal , kerosene etc.

* The deposition of fuels inside the Earth is limited.




2. Non-conventional sources – sources of energy which have start to using recently are called Nonconventional sources of energy . e.g. Solar energy ,biofuels,

hydroelectric power plants ,nuclear energy , hydroelectric power project etc.

Sources of energy –Non-conventional sources



Sources of energy –Non-conventional sources

Documents

STD – 6 th SUB – SCIENCE 9.Work and energy Force and work Relation between work and energy Measuring work Potential energy and kinetic energy