Physics I Honors
Chapter 4
Other Chapters
Color Key
Black: In Class
Green: Due/Test
Red: Homework
Blue: Related links
Updated 11.3.2008
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Tuesday, October 21
Wednesday, October 22
- 5th
- Calculating weight on Earth and Moon, etc.
- Balanced and unbalanced forces, resistive forces, net force and equilibrium
- Example: A 3200 kg truck undergoes acceleration from an 6000 N force from the engine. What is its acceleration rate? How much time to accelerate to 29 m/s (about 65 mph)? What about if it has 1000 kg of cargo aboard? What if 250 N of friction exists?
- A 43 kg boy pushes horizontally on the ground with a force of 82 N. A frictional force of 3 N exists. What is the boy's acceleration rate?
- Equilibrium with the bird on a wire problem
- Two people pull on ropes connected to a 520 N crate. They each pull with a force of 130 N but are pulling 30° from the centerline of motion. What is the acceleration rate of the crate? What if a friction force of 220 N exists? What if the friction force is 80 N?
- 6th/7th
- Calculating weight on Earth and Moon, etc.
- Balanced and unbalanced forces, resistive forces, net force and equilibrium
- Example: A 3200 kg truck undergoes acceleration from an 6000 N force from the engine. What is its acceleration rate? How much time to accelerate to 29 m/s (about 65 mph)? What about if it has 1000 kg of cargo aboard? What if 250 N of friction exists?
- A 43 kg boy pushes horizontally on the ground with a force of 82 N. A frictional force of 3 N exists. What is the boy's acceleration rate?
- Equilibrium with the bird on a wire problem
- Two people pull on ropes connected to a 520 N crate. They each pull with a force of 130 N but are pulling 30° from the centerline of motion. What is the acceleration rate of the crate? What if a friction force of 220 N exists? What if the friction force is 80 N?
Thursday, October 23
- 5th/6th
- P. 109; 1-2, 5-7, 11 due
- Go over problems
- *More examples of balanced and unbalanced force problems
- 7th
- P. 109; 1-2, 5-7, 11 due
- Go over problems
Friday, October 24
- 5th/6th
- Bird on a Wire problem examples
- Homework problem hints
- *Inclined plane
- Atwood machine
- 7th
- Bird on a Wire problem
- Homework problem hints
Monday, October 27
- 5th
- P. 109; 15 to 20 due
- Go over problems
- 7th
- P. 109; 15 to 20 due
- Go over problems
Tuesday, October 28
- 5th
- Homework questions?
- That mu you do
- Friction formula and values for friction
- 6th/7th
- Homework questions?
- Air track demos
- Atwood's machine
- Forces on an inclined plane
- *That mu you do
- Friction formula and its values
Wednesday, October 29
- 5th
- P. 111; 24–26, 29–31 due
- go over homework
- 6th/7th
- P. 111; 24–26, 29–31 due
- go over homework
- Intro. to friction lab
- *Friction Lab
Thursday, October 30
- 5th/6th
- Static vs. kinetic friction
- Some more examples: A 55 kg box is pulled along with a force of 70 N by a rope that makes a 40° angle with the horizontal. How fast is the box moving after 2.0 s if it starts at rest? What if the coefficient of friction is 0.2? (How much more force is required to make it move at constant speed?
- A 40 kg lawnmower is pushed along the ground at a constant speed. The person pushes on the handle with an angle of 45° and a force of 200 N. Calculate the coefficient of friction.
- *Some friction examples
- Intro. to friction lab
- 7th
- Friction Lab
Friday, October 31
Monday, November 3 – Mr. Flint out ill today
Tuesday, November 4
- 5th
- P. 112, 35-38 due
- go over problems
- 6th/7th
- P. 112, 35-38 due
- go over problems
- *Friction on an inclined plane
- Atwood's machine
Wednesday, November 5
- 5th
- P. 112, 39-42 due
- go over problems
- 6th/7th
- P. 112, 39-42 due
- go over problems
- *High speed crash test videos
Thursday, November 6 and Friday, November 7 – No School – Parent/Teacher Conferences
Monday, November 10
- 5th
- Chapter 4 problems due download a copy
- hand in homework
- Friction on an inclined plane problem where mu=tan theta and limiting angle of repose
- 7th
- Chapter 4 problems due download a copy
- go over problems
- Friction on an inclined plane problem where mu=tan theta and limiting angle of repose
Tuesday, November 11
- 5th
- Friction Lab due
- Go over homework solutions to Chapter 4 Problems
- Work on Chapter 4 Review
- 6th/7th
- Friction Lab due
- Go over homework solutions to Chapter 4 Problems
- Work on Chapter 4 Review
Wednesday, November 12
Thursday, November 13
- 5th/6th
- DiscoveryRide video
- *6th period: Chapter 4 Test
- 7th
- Chapter 4 Test
Thursday, November 13
- 5th/6th
- DiscoveryRide Energy worksheet
- 7th
- DiscoveryRide Energy worksheet
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