Download Potential and Kinetic energy

Energy
Glencoe Chapter 5 Section 1
Pages 128-133
Name:
What is Energy?
I. Work and Energy
A. Energy –
1. Work –
(force across a distance)
 Example –
2. Energy is measured in _________________
B. Potential energy (PE) –
1. There are two types of potential energy
a. _____________________________ – energy of position
- Examples 
b. _____________________________ – stored energy
- Examples 
2. Energy that is waiting to be released
C. __________________(KE) – energy of…
 Energy of motion
1. Depends on the ____________and _____________ of the moving object
2. Faster and more massive =
D. Other forms of energy
1. Kinetic molecular energy  energy of moving atoms and molecules
2. ________ energy  energy released in chemical reactions
 energy stored in the food you eat
3. ________ energy  nuclear reactions (fission, fusion), the sun
4. ________ energy  sunlight, electromagnetic waves
5. ________ energy  electricity, movement of charged ions and electrons
Glencoe Chapter 5 section 2
Pages 135-143
II. Conservation of Energy
A. The Law of Conservation of Energy –
1. Potential energy changes to Kinetic energy as a ball rolls down a hill (stored
energy changing slowly to energy of motion.)
2. This transformation occurs ______________, NOT all at once.
3. At the top of the hill all the energy is potential, at the bottom of the hill all the
energy is kinetic (until the ball stops rolling)
4. Some energy is lost to ___________ and _________, but it is not destroyed
 In-class review: Page 143 #1-4
Homework / Review work:
1. Pages 148-149 #1-13, 15-21 – Write questions and answers.