A pendulum is motionless at its maximum height at Point A and then released. It swings to its maximum height at point D.
What form of energy does it have at Point A before it is released?
What energy transformation occurs between point A and point B?
At what point does it have its maximum KE?
At what point does the pendulum have both PE and KE?
Homework to be completed:
Today’s agenda:
Review Energy transformations LO
Review the Do Now problem
Review Energy transformations LO
Basic forms of energy:
potential - stored energy
gravitational - stored by gravity and height
elastic - stored by stretching/compressing certain materials
chemical - stored in bonds between atoms of foods and fuels
nuclear - stored in the nucleus of atoms
kinetic - energy of motion
thermal - vibration of atoms in a substance due to temperature
sound - vibration of atoms in air
electric - flow of electric current (electrons) through wires
Mechanical - total of KE and PE in any system of parts
Radiant - light energy, electromagnetic radiation
Energy Transformations
Conservation of Energy
during any energy transformation - the total energy does not change
total energy before the transformation equals the total energy after the transformation
energy is neither created nor destroyed
PhET Energy forms and Changes Tool
activity