ENERGY

Energy is the

capacity to do

work.

Unit of energy is

Joule

•Potential energy

•Kinetic energy

•Mechanical energy

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

Kinetic energy,

k=1/2mv2

M=mass and v is the

velocity of object

Potential energy is the

energy possessed by an

object by virtue of their

position.

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 can

be defined as the sum

of kinetic and potential

energies of an object.

E=U+K where u is the

potential energy and k

is the kinetic energy

KINETIC ENERGY

Energy possesed by a moving ball

Energy possessed by falling water

Energy possessed by a falling stone

Energy possessed by water in dam

Energy possesed by a stone lying on ground

Energy possessed by a book lying in table