Q1: How does the height of the shooter affect the distance traveled by the marshmallow?
IV: Height of the shooter
DV: Distance the marshmallow travels (inches)
CV: the marshmallow and the shooting device and the force of the blow
Q2: How does the shooting device's texture affect the distance traveled by the marshmallow?
IV: Different paper used to shoot the marshmallow
DV: Distance the marshmallow travels (inches)
CV: Marshmallow, force of the blow, and height
Q3: How does the strength of the blow affect the distance traveled by the marshmallow?
IV: How hard the marshmallow is blown into by the shooter
DV: Distance the marshmallow travels (inches)
CV: The shooting device, the marshmallow, the height
all good
NG2 Investigate
Procedure:
Procedure:
- First we decided to conduct three different tests for the variable of height. We achieved this by shooting the marshmallow in a straight direction from standing on the ground, then standing on a chair, and finally on an elevated table. We also kept the marshmallow, the tube, and the force of blow constant. We then recorded the data what data? what exactly did you measure? with various meter sticks
The data we recorded was how far the marshmallow traveled in inches with different independent variables affecting it.
- We then repeated a similar experiment but instead of height, we tested how far the marshmallow went when shot from a tube made from different material. We used three different tubes made from a folder binder, binder paper, and wax paper while also keeping constant the marshmallow, the height, and the force of blow. We then recorded the data with meter sticks again.
- Lastly, we shot the marshmallow by blowing with different forces from the tube. The tube, the height, and the marshmallow were kept constant this time. Using meter sticks once more, we measured how far the marshmallow went when the tube was blown softly, medium, and hard.
NG3 Data
Experiment 1
VM: As the height from which the marshmallow was shot increases, the distance it travels also increases
Experiment 2
VM: When the material of the paper of each tube is thicker, the marshmallow travels further.
Experiment 3
VM: As the force of the blow increases, the distance traveled by the marshmallow also increase
NG4 Model
The equation p = mv is the equation from momentum. This means that Momentum = Mass x Velocity. We learned that momentum can be defined as a "mass in motion". The velocity of that mass affects the quality of its motion. The equation FT = mΔV is the equation for impulse. This means that Force x Time = Mass x Change in Velocity. We learned that impulse in physics is the change in momentum. We observed the relationship between momentum and impulse in our lab experiment. For example, other experiments conducted by our peers chose to make the length of the tube the independent variable. This affected the time
We observed similar data from other groups' experiments. The data in almost all of our experiments showed that the momentum affected the time it took for the marshmallow to reach the ground. no it doesn't - only the height affects the time to hit the ground. Whether the independent variable was height or force of blow, it was not surprising to observe that further the marshmallow was from the ground, the more longer it stayed in the air because more time was needed for gravity to pull it back down.
hmmm.. I am not convinced you know well how this equation works... some stuff is there but I would like to see a clearer explanation of how the force affects velocity (thus affecting distance), same for time in the tube (although that explanation wasn't so bad). And how does the equation tell you the velocity the mallow leaves the tube with, and then how does the height allow it to go further....
I now have better understanding of the equation for impulse FT = mΔV. In one of our experiments, we held the force and the mass of the marshmallow constant. We then made the time our independent variable by increasing the height from which the shooter blown. The higher the platform, the more time the marshmallow stayed in the air. As the time increased for the marshmallow to stay in the air, the velocity also increased in turn. Another example that we did not do in our experiment was to keep force and time constant. Therefore if we increased the mass of the marshmallow, its velocity would then increase as well.
NG5 Evidence
During our experiment, we committed some small errors. First, we had three shooting tubes but with different measurements for their radius. This affected how much air escaped from the tube when blowing the marshmallow, which thus affected how large or small the velocity truly was. yep Another error that we had in our experiment was that we didn't really know how to keep the force of the blow constant. There was no way to accurately measure how hard to blow, so we tried our best to estimate how hard or soft to blow in experiments 1 and 2. Lastly, we made a mistake by forgetting to roll the marshmallow in flour before shooting it. Over time, the marshmallow became sticker since we kept picking it up and shooting it. The stickier it became, the harder it took to smoothly get the marshmallow out. The flour could have prevented this stickiness, which presented some additional difficulty when shooting the marshmallow out of the tube. We could have improved this experiment by a performing different tests with different independent variables. A good experiment that my peers tested was how the length of the tube affected the distance traveled by the marshmallow. This would have been better to perform that our experiment 2 because this one affected the impulse. We also could have improved this test by repeating each experiment to confirm our results. yes. good work!
