Energy

1. Elastic potential energy is the energy that a body possesses by virtue of its condition

2. The law of conservation of energy states that energy can not be created or destroyed. It can be transformed from one form to another

3. Mass and energy are inter-related. Equation: E= m*c*c

4. Efficiency is defined as the ratio of the useful power output to the power input expressed as a percentage

5. Potential energy is the energy a body possesses by virtue of its position or condition

6. PE= mgh

7. Gravitational potential energy is the energy possessed by a body due to its height

8. It is defined as the capacity to do work

9. Unit: Joules (J)

10. Different forms of energy: Chemical, Nuclear, Radiant, Electrical, Internal, Mechanical (a) Kinetic Energy, (b) potential energy- (i) Gravitational potential, (ii) Elastic potential

11. Kinetic energy of a body is the energy that a body possesses by virtue of its motion

12. Formula= 1/2*m*v*v