Work:- Work done by the force is defined as dot product of force and displacement vector
- For constant Force
where F is the force vector and s is displacement Vector
-For variable Force
-It is a scalar quantity
Conservative And Non Conservative Forces
-If the workdone by the force in a closed path is zero,Then it is called conservative Force
-If the workdone by the force in a closed path is not zero,Then it is called non conservative Force
-Conservative Forces are gravtitional ,electrical force
-Non Conservative Forces are friction
Kinetic Energy:-It is the energy possesed by the body in motion
-it is defined as
- Networkdone by the external force is equal to the change in the kinetic energy of the system
-It is the kind of energy possesed due to configuration of the system
-It is due to conservative force
-it is defined as
Where F is the conservative force
For gravtitional Force
Change in Potential Energy =mgh
where h is the height between the two points
Mechanical Energy is defined as
Law Of conservation of Energy
In absence of external forces,intenal forces being conservative ,total energy of the system remains constant.
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