Name ____________________________Date ______________ Period _____

Conservation of Energy NotesConserved Quantities

• As we have already learned, mass is a conserved quantity (___________________________________)

Mass of Light Bulb = Mass of all shattered pieces

• Mechanical Energy -

• Nonmechanical Energy - ________________________________________ (nuclear, chemical, internal, and electrical, thermal, radiant, acoustic)

• Negligible or irrelevant for most problems

• Motion of a Clock Pendulum

• Highest point of swing- only ______________________

• Other points of swing- ______

• ________________ from springs inside

Conservation of Mechanical Energy

• In the absence of _______________ and regardless of the path the object travels, the ________________________________________________________________________.

Initial Mechanical Energy= Final Mechanical Energy

Name ____________________________Date ______________ Period _____

Friction

• Mechanical Energy is __________________________ in the presence of ________________.

• When there is kinetic friction, kinetic energy is __________ into a __________________form of energy

• Nonmechanical energy is _________________________________________.

• ________________ is _____________ conserved, but Mechanical Energy can be “lost”

Practice

Starting from rest, a child zooms down a frictionless slide from an initial height of 3.00 m. What is her speed at the bottom of the slide? Assume she has a mass of 25.0 kg.

Create a concept map for energy. Include the following terms: energy, thermal, gravitational, acoustic, potential, electrical, elastic, radiant, nuclear, kinetic, mechanical, internal, nonmechanical, and chemical.