## 2nd Quarter: December 5 - 9

## Monday, December 5th

**2nd Period: Today in class.....**

- Today we were able to move a bit more forward will work and power.
- We looked at one example with power before our lab and one afterwards.
- Afterwards, we did our Power Step Lab to determine the most powerful young man and woman in class.

**HOMEWORK**: Work HW (attached below)

Work, Power, & Energy 12-5 2nd Period.pptx | |

File Size: | 138 kb |

File Type: | pptx |

Class Examples 3-4 - Solutions.pdf | |

File Size: | 1533 kb |

File Type: |

Work - HW.pdf | |

File Size: | 39 kb |

File Type: |

**4th Period: Today in class....**

- Today we started with a quick review of work done by a variable force.
- Afterwards, we focused on the work-energy theorem. We looked at a couple examples together (examples 5 - 7 shown below) and finished with some examples done independently

**HOMEWORK:**Finish the two practice problems given in class.

Work, Power, & Energy 12-5 4th Period.pptx | |

File Size: | 504 kb |

File Type: | pptx |

Class Examples 5-7 - Solutions.pdf | |

File Size: | 1652 kb |

File Type: |

## Wednesday, December 7th

**2nd Period: Today in class....**

- Today we started with work done by a variable force - to evaluate this, we look at a graph of force vs. displacement.
- Afterwards, we looked at different kinds of energy. The first kind we address specifically we kinetic energy or energy or motion.
- To end class, we looked at the work-energy theorem which connects the total work done to the change in kinetic energy.

**HOMEWORK:**Work done by a Variable Force

Work, Power, & Energy 12-7 - 2nd Period.pptx | |

File Size: | 573 kb |

File Type: | pptx |

Work by a Variable Force - Example Solutions.pdf | |

File Size: | 1746 kb |

File Type: |

Work by a Variable Force HW.pdf | |

File Size: | 74 kb |

File Type: |

**4th Period: Today in class....**

- After a quick review of the work-energy theorem, we shifted our attention back to energy looking at gravitational potential energy. This is an energy of position based on vertical height.
- From there we discussed the conservation of energy - energy is neither created nor destroyed, just trasferred.
- After a couple quick demonstrations, we were able to look at one example before running out of time.

Work, Power, & Energy 12-7 - 4th Period.pptx | |

File Size: | 527 kb |

File Type: | pptx |

## Friday, December 9th

**2nd Period: Today in class.....**

- Today we focused on the work-energy theorem. It is a more complex physics theorem, but can be done by tackling one side at a time.
- The solutions to our class examples are attached below.
- We spent our shortened class period practicing. Please come by in the next class period or so for help if you need it.

**HOMEWORK:**Work-energy theorem practice problems.

Class Examples 5-7 - Solutions.pdf | |

File Size: | 1652 kb |

File Type: |

**4th Period: Today in class....**

- Today we practice with conservation of energy. This is a huge idea in physics - the total mechanical energy of a system remains constant as an object moves (in perfect physics world at least!)
- We looked at our very last two examples in this chapter - examples 9 and 10. Solutions are attached below.
- We didn't start our energy lab (we'll do it next time!) but we did look at pulley systems briefly as a way to maximize our force.