Physics I Honors
Chapter 5
Other Chapters

Course Info.
Syllabus
Class Rules
Class Rosters
Physics Top Ten
Writing Lab Reports
Formula Card

Contacts
Discussion Group
E-Mail Mr. Flint
AOL IM w/Mr. Flint

Other Links
Current Weather
Online Calculators

Color Key
Black: In Class
Green: Due/Test
Red: Homework
Blue: Related links

Updated 11.17.2008

Friday, November 14

  • 5th/6th
  • Extra credit presentation
  • Finish DiscoveryRide video
  • *Energy is the ability for something to cause any change in itself or its environment
  • Forms of energy:
    • Heat, sound, vibration, translation, rotation, kinetic, potential (spring, gravitational, chemical), nuclear, electrical/magnetic, etc.
  • Law of Conservation of Energy - Energy cannot be created nor destroyed - only transformed in a change process
  • What forms of energy does the food we eat change into?
  • What forms of energy does the gasoline we put into cars change into?
  • DiscoveryRide energy worksheet download a copy
    • Chemical potential energy and metabolism
  • 7th
  • Finish DiscoveryRide video

Monday, November 17

  • 5th
  • Continue Discovery Ride energy worksheet
    • Gravitational Potential Energy
    • Work
      • W=Fd; Work's unit is joule [J] Read about James Prescott Joule's honeymoon adventures
      • Work/Energy theorem (W=deltaK)
      • Work is only done if the force is applied for a distance!
      • If there is no distance then no work is done
        • How much work is done pushing a book down on a desk? none
        • How much work is done sliding a book along a desk? W=Fd=frictional force times the distance. frictional force is equal to mu times the normal force
        • How much work is done holding a book in a stationary position? none - no distance change
        • How much work is done carrying a book up stairs? W=Fd=weight of the book times the height of the stairs. no work is done in the horizontal direction because no force is applied horizontally
        • How can you do more work by carrying books up stairs?
    • Power
    • Kinetic energy
  • Intro. to Power Lab download a copy
  • 7th
  • Energy is the ability for something to cause any change in itself or its environment
  • Forms of energy:
    • Heat, sound, vibration, translation, rotation, kinetic, potential (spring, gravitational, chemical), nuclear, electrical/magnetic, etc.
  • Law of Conservation of Energy - Energy cannot be created nor destroyed - only transformed in a change process
  • What forms of energy does the food we eat change into?
  • What forms of energy does the gasoline we put into cars change into?
  • DiscoveryRide energy worksheet download a copy
    • Chemical potential energy and metabolism

Tuesday, November 18

  • 5th
  • Power Lab download a copy
    • This lab requires you to be physically active - you'll be running up a flight of stairs. If you cannot participate in the lab due to a physical condition then let Mr. Flint know. It's not a problem at all - we'll have lots of data.
  • 6th/7th
  • Continue Discovery Ride energy worksheet
    • Gravitational Potential Energy
    • Work
      • W=Fd; Work's unit is joule [J] Read about James Prescott Joule's honeymoon adventures
      • Work/Energy theorem (W=deltaK)
      • Work is only done if the force is applied for a distance!
      • If there is no distance then no work is done
        • How much work is done pushing a book down on a desk? none
        • How much work is done sliding a book along a desk? W=Fd=frictional force times the distance. frictional force is equal to mu times the normal force
        • How much work is done holding a book in a stationary position? none - no distance change
        • How much work is done carrying a book up stairs? W=Fd=weight of the book times the height of the stairs. no work is done in the horizontal direction because no force is applied horizontally
        • How can you do more work by carrying books up stairs?
      • Examples:
        • How much work is done lifting a 35 kg concrete block a height of 0.85?
        • How much work is done moving the block down a hallway 13 m at constant speed?
        • You pull a 42 kg boy on a sled with a rope that makes a 32° angle with the ground. The pull forc is 52 N. How much work is done in moving the boy a distance of 220 m?
  • Intro. to Power Lab download a copy
  • *Power Lab
    • This lab requires you to be physically active - you'll be running up a flight of stairs. If you cannot participate in the lab due to a physical condition then let Mr. Flint know. It's not a problem at all - we'll have lots of data.

Wednesday, November 19

  • 5th:
  • Power Lab due
  • More work and energy examples
  • Kinetic energy
    • Defining KE
    • Use of the work-energy theorem
    • A person does 420 J of work on a box by increasing its speed from rest to 3.5 m/s in 8 s. What is the mass of the box? What is the weight of the box? How much work is needed to make it move 7.0 m/s?
    • A car with a mass of 1200 kg is moving 45 m/s. What velocity does a truck with mass 3800 kg need to have the same energy?
    • A crate with a mass of 13 kg is pulled up an inclined plane with a constant velocity of 2.5 m/s. The pull force is 84 N parallel to the plane and the plane has an angle of 35°. Calculate: mu, KE, Work by gravity, work by you work to friction, change in potential energy. Show the conservation of energy still works.
  • 6th/7th:
  • Power Lab due
  • Work
    • W=Fd; Work's unit is joule [J] Read about James Prescott Joule's honeymoon adventures
    • Work/Energy theorem (W=deltaK)
    • Work is only done if the force is applied for a distance!
    • If there is no distance then no work is done
      • How much work is done pushing a book down on a desk? none
      • How much work is done sliding a book along a desk? W=Fd=frictional force times the distance. frictional force is equal to mu times the normal force
      • How much work is done holding a book in a stationary position? none - no distance change
      • How much work is done carrying a book up stairs? W=Fd=weight of the book times the height of the stairs. no work is done in the horizontal direction because no force is applied horizontally
      • How can you do more work by carrying books up stairs?
    • Examples:
      • How much work is done lifting a 35 kg concrete block a height of 0.85?
      • How much work is done moving the block down a hallway 13 m at constant speed?
      • You pull a 42 kg boy on a sled with a rope that makes a 32° angle with the ground. The pull forc is 52 N. How much work is done in moving the boy a distance of 220 m?
  • * Kinetic energy
    • Defining KE
    • Use of the work-energy theorem
    • A person does 420 J of work on a box by increasing its speed from rest to 3.5 m/s in 8 s. What is the mass of the box? What is the weight of the box? How much work is needed to make it move 7.0 m/s?
    • A car with a mass of 1200 kg is moving 45 m/s. What velocity does a truck with mass 3800 kg need to have the same energy?
    • A crate with a mass of 13 kg is pulled up an inclined plane with a constant velocity of 2.5 m/s. The pull force is 84 N parallel to the plane and the plane has an angle of 35°. Calculate: mu, KE, Work by gravity, work by you work to friction, change in potential energy. Show the conservation of energy still works.
  • World's strongest man?

Thursday, November 20

  • 5th/6th
  • P. 151, 1-6 due
  • go over problems
  • World's strongest man?
  • 7th
  • P. 151, 1-6 due
  • go over problems
  • *Gossamer Condor Video Gossamer Albatross and Helios information
  • The prize is worth about $340,000 today
  • Conservation of PE & KE with a bowling ball

Friday, November 21

  • 5th/6th
  • Conservation of example problems
    • Conservative mechanical energy:
      • Conservation of energy with the bowling ball. What is its speed at the bottom? Does mass matter?
      • How fast is a stone falling after dropping 7.0 m?
    • Nonconservative mechanical energy:
      • A bird exerts 15 N of force to fly at constant speed for a distance of 25 m.
      • A crate slides down a 3.0 m long inclined plane set at a 25° angle. The crate starts at rest and is moving 4.0 m/s at the bottom of the ramp. What is mu?
  • *Gossamer Condor Video Gossamer Albatross and Helios information. The prize is worth about $340,000 today
  • 7th
  • Conservation of example problems
    • Conservative mechanical energy:
      • Conservation of energy with the bowling ball. What is its speed at the bottom? Does mass matter?
      • How fast is a stone falling after dropping 7.0 m?
    • Nonconservative mechanical energy:
      • A bird exerts 15 N of force to fly at constant speed for a distance of 25 m.
      • A rock falls a distance of 7.0 m. It lands with a speed of 10.0 m/s. What is the average drag force placed on the rock by the air?
      • A crate slides down a 3.0 m long inclined plane set at a 25° angle. The crate starts at rest and is moving 4.0 m/s at the bottom of the ramp. What is mu?

Monday, November 24

  • 5th
  • P. 151, 9–14 due
  • *Hooke's Law
    • Demonstrate two spring scales (red and green) with 500g hanging mass
    • F=-kx
    • PE=1/2 kx2 since F is average force
    • Spring constants are like 100 N/m for easy springs, 10000+ N/m for tough springs.
    • Stretch is proportional to force until near elastic limit.
  • 7th
  • P. 151, 9–14 due

Tuesday, November 25

  • 5th
  • Hooke's Law
    • Demonstrate two spring scales (red and green) with 500g hanging mass
    • F=-kX
    • PE=1/2 kx2
    • Spring constants are like 100 N/m for easy springs, 10000+ N/m for tough springs.
    • Stretch is proportional to force until near elastic limit.
  • A spring where k=120N/m is compressed to a distance of 0.45 m. How fast will a 2.5 kg block move if it is accelerated by the spring? What distance will the box move if mu is 0.56?
  • A spring is used on a pinball machine to accelerate an 80g pinball. The pinball plunger is pulled back 0.25 m and the ball ends up moving 14 m/s. What is the spring constant of the plunger spring? What is the velocity when the pinball reaches the back of the machine (a distance of 1.2 m and an angle of 8°)
  • 6th/7th
  • More Hooke's Law examples
  • A spring is used on a pinball machine to accelerate an 80g pinball. The pinball plunger is pulled back 0.25 m and the ball ends up moving 14 m/s. What is the spring constant of the plunger spring? What is the velocity when the pinball reaches the back of the machine (a distance of 1.2 m and an angle of 8°)

Wednesday, November 26

  • 5th
  • Pedal Power video
  • 6th/7th
  • *Pedal Power video

Thursday, November 27 through Monday, December 1 – No School

Tuesday, December 2

  • 5th
  • P. 151; 19, 21–25 due
  • 6th/7th
  • P. 151; 19, 21–25 due
  • Intro. to Conservation of Energy lab
  • Work on homework

Wednesday, December 3

  • 5th
  • P. 152, 26–31 due
  • 6th/7th
  • P. 152, 26–31 due
  • *Conservation of Energy lab

Thursday, December 4

  • 5th/6th
  • Work done by varying forces
  • *Intro. to Conservation of Energy lab
  • Conservation of Energy lab
  • 7th
  • Work done by varying forces
  • Work on homework problems

Friday, December 5

  • 5th/6th
  • P. 154, 48-53 due
  • Go over problems
  • *Work on homework
  • 7th
  • P. 154, 48-53 due
  • Go over problems

Monday, December 8

  • 5th
  • P. 154, 55-57 due
  • Hand in homework
  • Energy conservation in vehicles and hybrid information
  • 7th
  • P. 154, 55-57 due
  • Hand in homework
  • Energy conservation in vehicles and hybrid information

Tuesday, December 9

  • 5th
  • Chapter 5 Review due
  • 6th/7th
  • Chapter 5 Review due
  • *Car Collisions: It's basic physics
  • Intro. to My Car's Safety

Wednesday, December 10

  • 5th
  • Chapter 5 Test
  • 6th/7th
  • Chapter 5 Test
  • *Momentum and collisions

Thursday, December 11

  • 5th/6th
  • Conservation of Energy Lab due
  • Car Collisions: It's basic physics
  • Intro. to My Car's Safety
  • 6th/7th
  • Conservation of Energy Lab due