P3: Conservation of Energy (Main sources of energy (Nuclear fuel, Bio-fuel…
P3: Conservation of Energy
Mass X Gravity X Height
Energy cannot be created or destroyed.
The pendulum shows the principle of conservation of energy in action. Gravitational potential energy is converted to kinetic energy and back, over and over again, as the pendulum swings.
useful energy transferred by the device
total energy supplied to the device
When work is done the energy is transferred from one type to another. This transferred energy may appear as kinetic energy.
MOVING OBJECT = Kinetic Energy = (Mass X Velocity)^2 X 0.5 (0.5 x mv^2)
Main sources of energy
2 ways of reducing unwanted energy transfer
Gravitational Potential Energy = Mass X Gravity X Height
Gravity = 10