Physics I Honors
Chapter 4
Other Chapters
Color Key
Black: In Class
Green: Due/Test
Red: Homework
Blue: Related links
Updated 11.15.2009
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Wednesday, October 28
- 5th/6th
- Projectiles Lab due
- Chapter 3 Extra Credit due
- Intro. to Chapter 4
- Newton's three laws of motion
- Comparing force and mass; S.I. & B.E.S. and their units
- *The four fundamental forces
- Defining weight as a special case of force
- 7th
- Projectiles Lab due
- Chapter 3 Extra Credit due
- The four fundamental forces
- Defining weight as a special case of force
Thursday, October 29
- 5th/6th
- 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
- *More examples of balanced and unbalanced force problems
- 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?
Friday, October 30
- 5th
- P. 109; 1-2, 5-7, 11 due
- Collect homework
- 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?
- 7th
- P. 109; 1-2, 5-7, 11 due
- Collect homework
- 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?
Monday, November 2
- 5th
- Static vs. kinetic friction
- Bird on a Wire problem examples
- Homework problem hints
- 6th/7th
- Bird on a Wire problem
- Homework problem hints
- *Inclined plane
- intro to friction
Tuesday, November 3
- 5th
- P. 109; 15 to 20 due
- Go over problems
- 6th/7th
- P. 109; 15 to 20 due
- Go over problems
- *That mu you do
- Friction formula and its values
- Atwood machine
Wednesday, November 4
- 5th/6th
- Inclined plane
- Atwood machine
- *Homework questions?
- That mu you do
- Friction formula and values for friction
- 7th
- Homework questions?
- Air track demos
- Atwood's machine
- Forces on an inclined plane
Thursday, November 5
- 5th/6th
- P. 111; 24–26, 29–31 due
- go over homework
- *Friction Lab
- 7th
- P. 111; 24–26, 29–31 due
- go over homework
- Intro. to friction lab
Friday, November 6
Monday, November 9
- 5th
- Friction on an inclined plane
- A 15 kg crate resting on a 35° ramp has a static coefficient of friction of 0.40 and a kinetic coefficient of friction of 0.35. Calculate:
- Minimum force to keep it from moving
- Force needed to move it up the ramp at constant speed
- Force needed to move it down the ramp at constant speed
- What if we want to move it 2.2 m up the ramp in 4.5 s?
- 6th/7th
- Friction Lab
- *Friction on an inclined plane
- A 15 kg crate resting on a 35° ramp has a static coefficient of friction of 0.40 and a kinetic coefficient of friction of 0.35. Calculate:
- Minimum force to keep it from moving
- Force needed to move it up the ramp at constant speed
- Force needed to move it down the ramp at constant speed
- What if we want to move it 2.2 m up the ramp in 4.5 s?
Tuesday, November 10
- 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 11
- 5th/6th
- P. 112, 39-42 due
- go over problems
- *Forces at an angle problems with pulling sled and pushing lawmower
- 7th
- P. 112, 39-42 due
- go over problems
Thursday, November 12 and Friday, November 13 – No School – Parent/Teacher Conferences
Monday, November 16
- 5th
- Chapter 4 problems due download a copy
- 6th/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
- Ratio of a/g is mu for flat surfaces...
Tuesday, November 17
- 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
- *DiscoveryRide video
Wednesday, November 18
- 5th/6th
- DiscoveryRide Q&A
- *DiscoveryRide Energy Worksheet
- 7th
- DiscoveryRide Q&A
- DiscoveryRide Energy Worksheet
Monday, November 23
- 5th
- Chapter 4 Test
- 7th
- Chapter 4 Test
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