TITLE

ENERGY

MINNU SOORYA.R.S

PHYSICAL SCIENCE

ENERGY

Energy is the capacity to do work.

Unit of energy is Joule

FORMS OF ENERGY•Potential energy•Kinetic energy

•Mechanical energy

Kinetic energy

Energy possessed by an object due to its motion is defined as kinetic energy.

KINETIC ENERGY

Kinetic energy, k=1/2mv2

M=mass and v is the velocity of object

POTENTIAL ENERGY

Potential energy is the energy possessed by an object by virtue of their position.

POTENTIAL ENERGY

U=Mgh,where m is the mass of the

body,g is acceleration due to gravity and h is the height of body from earth.

MECHANICAL ENERGY

Mechanical energy can be defined as the sum of kinetic and potential energies of an object.

Mechanical energy

E=U+K where u is the potential energy and k is the kinetic energy

EXAMPLES

KINETIC ENERGY Energy possesed by a

moving ball Energy possessed by falling

water Energy possessed by a

falling stone

POTENTIAL ENERGY

Energy possessed by water in dam

Energy possesed by a stone lying on ground

Energy possessed by a book lying in table

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