Download Conservation of Energy

Bowling Ball Pendulum Warm Up
Predict what will happen when the bowling ball
is released from the tip of the teachers chin and
then returns.
Bowling Ball Pendulum Warm Up
• Did the bowling ball smack the teacher in the
chin? Did it rise higher or lower than its
original height?
• At what point did the bowling ball have the
most gravitational potential energy?
• At what point did the bowling ball have the
most kinetic energy? How do we know this?
Transfer of Energy
Energy Transfer: Energy transfer is the transfer of
energy from one object or material to another.
Energy Transformation: Energy transformation is
the process of changing one form of energy to
another.
Watch Music Video: Ok Go – “This Too Shall Pass”
Make a list of all energy transfers you can find.
http://www.youtube.com/watch?v=qybUFnY7Y8w
Share two energy transfers/transformations with
your partner.
Be ready to share with the class
Conservation of Energy
Conservation of Energy is a fundamental principle
that energy cannot be created or destroyed.
Energy is just transferred between objects and
transformed in to different forms.
Energy Review
1. What does energy allow us to do?
2. Is energy a physical object?
3. Can objects have energy? Why?
Energy Types Reminder
Gravitational Potential Energy
Kinetic Energy
Elastic Energy
Thermal Energy
Energy Cubes Activity:
• Track the energy transfers and transformations.
• Show the relationship between gravitational, kinetic,
elastic, and thermal energies.
• Describe energy transfers and transformations between
two time points in a scenario.
Energy Bar Charts (LOL)
• A visual way to account for the energy in a system. Where the
energy is being stored and any transfers, into or out of the
system
Energy Conservation Equation:
Example 1
Draw an energy bar chart for a ball dropped.
Initial point: Ball held above the surface
Final point: Ball right before it hits the ground
Energy Conservation Equation: