Work , Energy and Power: Work , Energy and Power Work is said to be done by a force when a body is displaced actually through some distance in the direction of the force applied. W=F. s
Conservative forces: Conservative forces A force is said to be conservative if work done by or against the forces in moving body depends only on the initial and final position of the body , and not on the nature of the path followed between the initial and the finial position .
Non conservative Force: Non conservative Force A force is said to be to be non conservative if any work done or against the force in moving a body from one position to another , depends on the path followed between these two position .
Power : Power Power of a person or machine is defined as the time rate at which work done by it. power=work done/time taken
Energy : Energy Energy of a body is defined as the capacity or ability to do work.
Kinetic energy : Kinetic energy The Kinetic energy of a body is the energy possessed by the body by virtue of it’s motion.
Potential energy : Potential energy The potential energy of a body is defined as the energy possessed by the body by virtue of it’s position in some field.
Collision : Collision A collision as n isolated event in which two or more colliding bodies exert relatively short time . There are two types of collision- Elastic collision Inelastic collision
Elastic collision: Elastic collision A collision in which there is absolutely no loss of kinetic energy is called elastic collision.
Inelastic collision : Inelastic collision A collision in which there occurs some loss of kinetic energy is called inelastic collision.
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