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week 4 science 2



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

Speed- how fast you are going in terms of direction 

velocity- speed plus direction you are moving 

acceleration- how fast you change you speed and direction 

FORCE CAUSES ACCELERATION 

Gravity pulls harder on more massive things, but more massive things are harder to speed up, density is a factor in gravity

Gravity races- tennis ball and piece of paper 

tennis ball won first - paper was crumbled looser, less dense, more air can go through 

tie second - paper was crumbled more into a smaller ball 

Investigating Swings 

variables to test: 

- kicking or not

- length of chain 

- pushed - or not 

- windy 

Does the length of the swing chain affect the time it takes to go back and forth? 

Hypothesis: Yes, the longer the chain the longer in time it will take to go back and forth. 

A description of what you learned in Thursday's lecture

We filled out formative assesments to disocver if weight has an affect of the period of a swing. We concluded that it does not. Gravity pulls on more massive children with more force, more massive children are harder to acceerate. Energy is never created or destroyed. 


Answer questions about the weekly textbook reading: 

What did you learn? 

I learned about potential and kinetic energy. I also learned that weight does not affect the period neither does the angle of release. However, a longer pendulum has a longer period. 

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?

I think more information on how to measure kinetic energy would be useful, I remember doing that in high school but I forgot most of the equations. 

What questions/concerns/comments do you have?

If energy is neither created or destroyed, where does the energy ome from? Force? Acceleration? How is energy just there? 

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