We will discuss the purpose of physics labs and demonstrations as a way of learning physics concepts. We will explore the physics cabinet in the science room to see what items are available.
Assignment
none
Session Minutes
45
Minutes Student Attended
45
Lesson Comments
We had a good discussion about concepts in physics and I demonstrated some basic concepts with what we found in his room. We explored the lab materials in the science room and found lots of items we can use in the future.
titration lab-determine the unknown molars strength of an acid (HCl) by titration with a known volume and molarity of sodium hydroxide base. Prepared the tubes, discussed how to fill and read the volumes, and how to properly perform the titration.
Assignment
complete lab sheet
Session Minutes
90
Minutes Student Attended
90
Lesson Comments
Two physics class periods were used for this chemistry lab. The difference in time will be made up by replacing a chemistry class on Friday with a physics class. Titration results were very accurate
Lab to demonstrate how acceleration changes in response to changing mass. Lab manual demonstration 19. All changes of mass in a dynamics cart are recorded in data along with the average time for each mass. The summary and data analysis will be completed tomorrow in class, along with a discussion of the results
Assignment
complete summary data
Session Minutes
90
Minutes Student Attended
90
Lesson Comments
Lab work was completed by Ben, as usual, very well done
Discuss why a large truck takes longer to stop than a small car, both traveling at the same speed. Introduce the concept of momentum as inertial in motion. Inertia involves mass and velocity. momentum can be mathematically designated as mass x velocity. Discuss what changes in mass and /or velocity will cause a change in momentum. Show he progression from force to change in velocity to change in acceleration, ending in a change in momentum (impulse). Discuss the two factors involved in impulse and momentum change, force and time. Elicit how force x time + impulse and an impulse is a change in momentum (delta) mv. Derive how ft=delta mv.
Review systems terminology.
Discuss momentum, use examples to include inertia in the definition. Define momentum in terms of mass and velocity. Show that momentum involves both mass and velocity. Elicit that momentum = mass x velocity. Changing momentum involves changing mass or velocity. Define impulse as force x time. Elicit how changes in veloity results in acceleration and a change in momentum.
Review how force and mass affect acceleration. Derive that acceleration is a change in force/ change in mass. Introduce systems in physics. Discuss forces which occur inside a system and those which occur outside a system. Determine that forces must be applied outside a system ,in the surrounding, in order for motion to occur. Show examples and use sketches.
Assignment
assignment A5
Session Minutes
45
Minutes Student Attended
45
Lesson Comments
Ben needed help and explanation regarding the assignment turned in today
