Energy is the capacity to do work

1. SUBMITTED BY
RAZANA.K.R
PHYSICAL SCIENCE
K.U.C.T.E
NEDUMANGAD

2. ENERGY

3. Energy is the capacity to
do work

4. Forms of Energy
• Light energy
• Heat energy
• Sound energy
• Electrical energy
• Solar energy
• Magnetic energy
• Chemical energy
• Nuclear energy
• Mechanical energy

5. Different Forms Of Mechanical Energy
• Potential Energy
• Mechanical Energy

6. POTENTIAL ENERGY
The energy possessed by a body
due to its position or state of strain
is called its potential energy.
If a body of mass m is at a height
h its potential energy is mgh.
Examples:
Water stored in a dam
A drawn bow

7. KINETIC ENERGY
Kinetic energy is the energy
possessed by objects by
virtue of their motion.
The kinetic energy of a body
of mass m and velocity v is,
K.E=½ mv2
Examples: Hitting the ball.
Shot moving from
the gun.

8. ENERGY TRANSFER
Chemical
Electrical
Sound
Light
(Electromagnetic)
Thermal
Mechanical

9. CONSERVATION OF ENERGY
Energy can neither be created nor be
destroyed. But one form of energy can be
transformed to another form without gain or
loss.