• 4th
• Energy is the ability for something to cause any change in itself or its environment
• Brainstorm 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
• 5th/6th
• Energy is the ability for something to cause any change in itself or its environment
• Brainstorm 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
• 8th
• Energy is the ability for something to cause any change in itself or its environment
• Brainstorm 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

Monday, December 12

• 4th/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?
• 6th
• 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?
• 7th/8th
• 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?

Tuesday, December 13 *Students in Mrs. Whitehill's health classes should report to health class today if you have it during 5th or 7th periods. Come to Physics lab tomorrow instead of going to health.

• 4th/5th
• Finish DiscoveryRide energy worksheet
• Power
• Kinetic energy
• Intro. to Power Lab download a copy
• *Power Lab
• 6th
• Finish DiscoveryRide energy worksheet
• Power
• 7th/8th
• Finish DiscoveryRide energy worksheet
• Power
• Kinetic energy
• Intro. to Power Lab download a copy
• *Power Lab

Wednesday, December 14

• 5th
• 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
• More about potential energy and power
• 8th
• 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.

Thursday, December 15

• 4th
• P. 151, 1-6 due
• Questions about problem? Hand in homework
• 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?
• 5th/6th
• P. 151, 1-6 due
• Collect problems
• Power; intro. to power lab
• *Power lab
• 8th
• P. 151, 1-6 due
• Collect problems
• 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?

Friday, December 16 – Short periods due to winter concert

• 4th
• Power Lab due
• Bowling ball pendulum problem
• 5th/6th
• Power Lab due
• Bowling ball pendulum problem
• *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.
• 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?
• 8th
• Power Lab due
• Bowling ball pendulum problem
• *Conservation of energy 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?

Monday, December 19

• 4th/5th
• P. 151, 9–14 due
• Go over problems
• Conservation of energy 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?
• 6th
• P. 151, 9–14 due
• Go over problems
• 7th/8th
• P. 151, 9–14 due
• Go over problems
• Conservation of energy 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?

Tuesday, December 20

• 4th/5th
• P. 151; 19, 21–25 due
• Conservation of energy 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?
• 6th
• P. 151; 19, 21–25 due
• 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°)
• 4th/5th
• P. 151; 19, 21–25 due
• Conservation of energy 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?

Tuesday, December 21

• 4th/5th
• P. 151; 19, 21–25 due
• Intro. to Conservation of Energy lab
• *Conservation of Energy Lab
• 6th
• P. 151; 19, 21–25 due
• Conservation of Energy lab
• 7th/8th
• P. 151; 19, 21–25 due
• Intro. to Conservation of Energy lab
• *Conservation of Energy Lab

Wednesday, December 22

• 4th/5th
• *Conservation of Energy Lab
• Work done by variable forces
• 6th
• Intro. to Conservation of Energy Lab
• 7th/8th
• *Conservation of Energy Lab
• Work done by variable forces

Thursday, December 23

• 4th
• Work on Conservation of Energy Lab and problems for after break
• 5th/6th
• Work on Conservation of Energy Lab and problems for after break
• 8th
• Work on Conservation of Energy Lab and problems for after break

Friday, December 24th through Monday, January 2– No School – Winter Break

Tuesday, January 3

• 4th/5th
• Work done by variable forces
• 6th
• Work done by variable forces
• 7th/8th
• Work done by variable forces

Wednesday, January 4

• 4th
• P. 152, 26–31 due
• 6th
• P. 152, 26–31 due
• 8th
• P. 152, 26–31 due

Thursday, January 5

• 4th
• P. 154, 48-53 due
• 5th/6th
• P. 154, 48-53 due
• 8th
• P. 154, 48-53 due

Friday, January 6

• 4th
• P. 154, 55-57, 59, 62 due
• Conservation of Energy Lab due
• 5th/6th
• P. 154, 55-57, 59, 62 due
• Conservation of Energy Lab due
• 8th
• P. 154, 55-57, 59, 62 due
• Conservation of Energy Lab due

Monday, January 9

• 4th/5th
• Chapter 5 Review
• *Car Collisions: It's basic physics
• 6th
• Chapter 5 Review
• *Car Collisions: It's basic physics
• 7th/8th
• Chapter 5 Review

Tuesday, January 10

• 4th
• Chapter 5 Test
• 6th
• Chapter 5 Test
• 8th
• Chapter 5 Test