week 9 science 2

The big question addressed in lab, and a description of what you did

In the begining of lab, we had a discussion about formative assesments and how important they are to encourage student learning. 

Why do you need to push a child on a swing to keep them going? 

Why does a swing slow doen and stop? 

- pendulum collides with air particles, speeding them up and slowing them down. the collissions transfer energy from the pendulum to the air. Air speeds up, energy is trandered to air, so less energy is in the swing. 

too much Force breaks the egg, big force means big acceleration 

F=ma 

acceleration = change in velocity/time 

we watched a video about Newtons Third Law

Energy transers from the egg to the surface, then.. surface matierlas fly off 

A description of what you learned in Thursday's lecture

NO LECTURE - EXAM 

Answer questions about the weekly textbook reading:

forces and energy 

What did you learn? 

I learned about potential and kinetic energy. When the egg dropped, it realted to the section of the book where it discusses about energy being transfered from moving object to the surface it hits. 

What was most helpful? 

The videos included in this reading were really helpful because it provided a good visual of real world objects to demonstrate the potential and kinetic energy. I also liked that this reading had a quiz question, alothugh I got it wrong the first time, it provided a good explanation of why the other answer was correct. 

What do you need more information on?

More information on how to create a sutiable serface would be helpful. We did a lot of trial and error for our egg drop and didnt grasp what surfaces would prevent the egg from breaking. I think it would he helpful to look into different types of materials and their ability to create a good enough surface. 

What questions/concerns/comments do you have?

Does a surface need to be softer or harder to prevent the egg from breaking? Does that surface change if egg is dropped from higher position?