1. livestream

2. went over solutions to review packets: CV review packet and CA review packet

3. discussed video demo and developed Newton's 1st Law: An object will maintain a constant velocity unless acted upon by a net force

4. reviewed demo to show how pushes/pulls (forces) change motion (data here)...students came up with Newton's 1st Law: An object will maintain a constant velocity unless acted upon by a net force (defined as a push or pull in a particular direction) (summary here)

5. discussed how forces can be represented by arrows: magnitude is represented by length of arrow; direction is represented by direction arrow points

6. discussed types of forces...developed the idea that the normal force is the force that a surface exerts on an object touching it...it is called the "normal force" since it pushes out always in a perpendicular, or normal, direction (force catalog here)

7. discussed the nature of the normal force - normal forces are forces that occur when surfaces push against each other. The direction of this force is always perpendicular (or normal) to the surface.

8. discussed the appropriate use of interaction diagrams to identify interaction forces between objects

9. students worked on Unit 2 Practice 1, a series of situations in which students identified the forces acting on a block and sketched appropriate force diagrams...each vector representing a force was labeled using the "on,by" subscript notation.

10. Today's Recording

1. No livestream today

2. students took Unit 1 Exam today

3. No Recording Today

1. livestream

2. discussed video demo and developed Newton's 1st Law: An object will maintain a constant velocity unless acted upon by a net force

3. reviewed demo to show how pushes/pulls (forces) change motion (data here)...students came up with Newton's 1st Law: An object will maintain a constant velocity unless acted upon by a net force (defined as a push or pull in a particular direction) (summary here)

4. discussed how forces can be represented by arrows: magnitude is represented by length of arrow; direction is represented by direction arrow points

5. discussed types of forces...developed the idea that the normal force is the force that a surface exerts on an object touching it...it is called the "normal force" since it pushes out always in a perpendicular, or normal, direction (force catalog here)

6. discussed the nature of the normal force - normal forces are forces that occur when surfaces push against each other. The direction of this force is always perpendicular (or normal) to the surface.

7. discussed the appropriate use of interaction diagrams to identify interaction forces between objects

8. students worked on Unit 2 Practice 1, a series of situations in which students identified the forces acting on a block and sketched appropriate force diagrams...each vector representing a force was labeled using the "on,by" subscript notation.

9. Today's Recording

1. livestream

2. performed the following experiment as a demonstration experiment: tggamm the relationship between the gravitational force, Fg and mass, m ... the result was Fg=(9.8)m where 9.8 had units of N/kg

3. discussed tomorrow's PivotInteractives activity: Fan Cart: Mass & Acceleration (Scaffolded)

4. students were told to complete the interaction diagrams and force diagrams for 1-10 on Unit 2 Practice 1

5. Today's Recording

1. no livestream today - Spencer absent

2. students should work on PivotInteractives activity: Fan Cart: Mass & Acceleration (Scaffolded)...used the assigned force and varied the mass of the glider...found the x vs. t graph (top opening) and fit a quadratic curve to get the coefficient of the t^2 term...this quantity is half the acceleration so double it to get the acceleration...each glider mass has its own acceleration...you are trying to find the relationship between the mass and the acceleration. See yesterday's video recording for more detailed explanation

3. students were told to complete the interaction diagrams and force diagrams for 1-10 on Unit 2 Practice 1 ... pictures of these diagrams should be uploaded to Google Classroom assignment for today.

4. No Recording today - Spencer absent

1. no livestream today

2. Unit 2 Force Notes

3. watch Today's Recording (see below) in its entirety: discussion includes additional examples of drawing interaction and force diagrams for physical situations; how to finish up your PivotInteractives Lab; finalizing the results of the weight vs. mass lab (w=mg)

4. Start and finish MasteringPhysics HP3s 2021

5. Today's Recording (about 43 minutes)

1. livestream

2. Unit 2 Force Notes

3. discussed the nature of the friction force: there is a static friction force and a kinetic friction force ... the friction force, Ff, depends on the coefficient of friction, mu, and the normal force, N in the following fashion: Ff=(mu)(N) via a friction experiment

4. worked several simple problems using force diagrams

5. developed Newton's 3rd Law : Fa,b = - Fb,a .... showed a video demonstrating this law: go here

6. students completed 3rd Law Challenge problem

7. discuss off-axis forces ... use force components and PacMan Rule

8. discussed examples of static equilibrium situations with at least one off-axis force requiring replacement with components

9. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. developed Newton's 3rd Law : Fa,b = - Fb,a .... showed a video demonstrating this law: go here

4. students completed 3rd Law Challenge problem

5. students started working on Practice 2 (they did the first one...they are to do the remaining ones on the front and back...on the back, they should do interaction diagrams and force diagrams for blocks A and B being careful to draw force arrows appropriate lengths)

6. began discussing off-axis forces

7. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. continued discussing off-axis forces ... use force components and PacMan Rule

4. discussed examples of static equilibrium situations with at least one off-axis force requiring replacement with components

5. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. discussed another example of a CV situation with an off-axis force requiring the use of the Pac-Man Rule

4. discussed physical situations requiring N2L

5. discussed Atwood's Machine situations (and modified Atwood's Machines)

6. discussed ramp problems

7. discussed Atwood's Machines with ramps

8. students took home and worked Unit 2: Practice 3

9. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. discussed modified Atwood's Machines

4. discussed ramp problems

5. discussed Atwood's Machines with ramps

6. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. continued discussing ramp problems

4. discussed Atwood's Machines with ramps

5. discussed more static and dynamic problems involving off-axis forces

6. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. discussed falling in air

4. discussed more static and dynamic problems involving off-axis forces

5. given force components, we found force magnitude and direction

6. students worked on Unit 2: Practice 4

7. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. Unit 2 quiz

4. discussed solutions to Unit 2: Practice 4

5. students began Pivot Interactives: Three Views of Projectile Ball

6. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. Unit 2 quiz retake

4. review for Tuesday's Unit 2 Exam

5. students continued Pivot Interactives: Three Views of Projectile Ball

6. Today's Recording

1. livestream

2. Unit 2 Force Notes

3. discussed solutions for Unit 2 Practice 1

4. review for Tuesday's Unit 2 Exam

5. reviewed concepts for projectile motion.

6. discussed the three types of horizontal launches (off cliffs)

7. Today's Recording

1. no livestream today

2. Unit 2 Force Notes

3. students took Unit 2 Exam

4. reviewed concepts for projectile motion.

5. discussed the three types of horizontal launches (off cliffs)

6. No Recording Today

1. no livestream today

2. Unit 2 Force Notes

watch the following videos:

• A Fast Intuitive Method for Free Fall Problems (14:57)

• Flipping Physics Introduction (6:58)

• Flipping Physics example with initial horizontal velocity part 1 (9.42)

• Flipping Physics example with initial horizontal velocity part 2 (7:56)

3. write down on paper some facts about projectile motion while watching the videos above, and upload a scan/pic of your notes to Google Classroom for today's assignment. Also, copy any examples on paper/ take pics/upload on any numerical examples from the videos.

4. Click submit on the Google Classroom assignment after you have watched the videos and uploaded your notes.

5. No Recording Today