Science Fair Project physics Morgan Olson, Thomas Donaldson

Statement of the Problem What amount of cornstarch and water mix stops cabob stick immediately?

Project Overview We are going to drop the cabob stick into a container filled with different amounts of cornstarch and water, hoping that the right amount of cornstarch and water will stop the cabob stick immediately.

Research Summarize your research here in three to five bullet points: Cornstarch and water mix hardens when great force is applies. When cornstarch and water is joined it creates a solid when it is at rest it is a liquid. The force of the cabob stick should create enough force to harden the cornstarch and water mix and stop the cabob stick This slide is delete if you are doing the experimental design labs

Variables  Independent variables: The independent variables are the amounts of cornstarch and water. We will start with one cup of water one cup of cornstarch and finish five cups of cornstarch and two and a half cups water of each increasing by a cup  Dependent variables: The dependent variable is the depth of the cabob stick. We will drop the cabob stick from 5 feet up.  Constant variables: the constants will be height, cabob stick, container, placement, angle, release point, and person dropping the stick.  Control group: one cup cornstarch ½ cup of water.

Hypothesis  Our hypothesis is that if the cornstarch and water mix hardens on contact with another object, since the mix hardens the hardened mix presses down on the bottom mix so the whole solution will be hardened and stop the cabob stick.

Materials  Cornstarch  Water  Cabob stick  Ladder  Container  Measuring cup

Procedure  1.Take 1 cup of cornstarch and take ½ cup of water and mix together in a jar.  2.Get unto the ladder at 5 feet and drop the cabob stick so it falls into the container.  3.Quickly take the cabob stick out of the solution and measure the depth.  4.Record the results.  5.Repeat steps but add one more cup of cornstarch and ½ of water (each experiment).  Add diagrams in your steps.

Photos  Add photos of your experiments.

Data/Observations Analyzes cabob stick drop test # test 1test 2test 3test 4 depth in inches1"3/4"

Conclusion The conclusion is that the cabob stick was stopped by the cornstarch/water solution. At the height of five feet and dropping the cabob stick straight down it only penetrated ¾ of an inch into the solution, when the solution was 4 inches deep.

Possible Experimental Errors Could not fall at exact velocity and that the cabob stick could fall when dropped in the solution and the results might not be as accurate as they could because of the consitisy of the solution you had to pull the cabob stick out immediately.

Applications and Recommendations I think next time we should vary in the cabob stick dropped and the height dropped from.

Works Cited Be sure to include print and electronic sources and put them in alphabetical order. This slide is delete if you are doing the experimental design labs