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