Final Cardboard Chair

Cutting out main chair foundation..

Excess Cardboard..

Double checking measurements..

Testing foundation with excess cardboard supports..

Cutting out final main 8 inch cardboard supports..

Cutting out final 4 inch cardboard supports..

Cutting out final 3 inch leg supports..


Cutting out final 5 inch chair back supports..

Model chair and actual chair measurements.

Testing chair before final back 3 inch leg supports are added.

Chair progress

Our legs to support the chair

Cardoard Chair Progress

We're making progress on our cardboard chair. We are testing out the idea of having cylindrical legs for the chair.

Kochs Law Lab Report

https://docs.google.com/open?id=0B7dQuiyiP5a-YjVjMzJjMzEtNWFmMS00ZmFmLWEwMjgtZDQ0Y2JmZGVlODJl

In this lab, we used equations and measurements to find the oscillation period and the force constant.  We used the following tools:
meter stick
weights
a spring

We also used the following equations:
PE=1/2KX^2
KE=1/2MV^2
PEg=MGH

First, we measured the spring displacement, the mass, and the time it took the spring to complete ten oscillations.  It took 8.5 seconds to complete ten oscillations, the mass was 55 grams, and the displacement was 14 cm.  After we found the gravitational potential energy, we used that to find the force constant, using our formulas.    We found that the time period for one oscillation is 0.85 seconds, and the force constant is 77.

Force

Materials:
Long piece of regular wood
a short piece of wood covered with sand paper on one side.
a protractor
caculations
Procedure:
We figured out at what angle the short peice of wood would slide down the long piece of wood on the smooth side. We also figured out the angle at which the sand paper side of the wood slid down the long piece of wood.
Results:
With the block weighing 160 grams. the regular board slide down the long piece at the angle of 22 degrees. the sand paper side of the block slide down the long board at an angle of 72 degrees.

Click link for work
https://docs.google.com/document/d/1xPdwACqlIdCP_0ZQ4-FrxPAk6dEnwGxpLNv5Sbfcl8M/edit?hl=en_US#

Inertia Trick

For our interita trick we are going "The Egg Drop Trick"

Procedure:

Fill a large glass about three-quarter of the way with water. Center a pie pan on the top of the glass. Center a cardboard tube (from paper towels or toilet paper) over the cup, in the pie pan. Finally, rest a raw egg on the top of the tube.
The glass, pie pan, tube and egg are at rest. With a quick striking motion, shove the edge of the pan so that the pan and the cardboard tube fly out of the way. The force is exerted on the pan and the tube, but not the glass or the egg. The glass will stay right where it is. Without support, the egg will succumb to the force of gravity and drop right into the cup.

Acceleration

We were studying acceleration. We had a partner and our partner would sit in the chair and the first time down the hallway we would push them slowly. When we came back we would push them really, really fast. The second time we did it we added 35 pounds to the chair and pushed them down the hallway. When we came back we just pushed an empty chair.

We learned that we used more force when we were pushing our partner really really fast than when we were pushing them slow. We also used more force when we pushed our partner with the 35 pounds than we did when we pushed the empty chair.

2 dimensional motion: horizontal initial velocity

PROCEDURE:
Video

DATA:

Time- .34 seconds
Initial Velocity= 1.59
Change in X=.6996
total time=.435

Analysis:
Data

CONCLUSIONS:
While we were doing the lab, we had difficulties with the timer. Also, our calculations never came out reasonable. When we were done we went back and tested it and see if the calculations were precise. Unfortunately, they weren’t. The second time around they came out correct.In the future, we can use this calculations for drop offs while flying or parachuting or something fun like that.    

Rat Race (Bug) Lab Report

Lab Report

PROCEDURE:

Bug Video

DATA:

Bug Tracker Spreadsheet

ANALYSIS:

Actual Calculations

CONCLUSIONS:

The bug would always stop in a certain spot. So, as you can see in the video, we had to bump the box. I do not know if this messed up the track. I learned how to calculate the displacement and distance. Also, I am learning how to use all this technology for the world we will be living in.