1/11/05
Monica Bradley, my parnter, and I made our goal is to test different sailboat features and discover it's relationship with velocity of the sailboat. And our problem: What is the relationship between the mass of the sail and the velocity of the boat?
Hypothesis: What relationship do we predict? Why? (based on what idea?)
Monica and I predicted that a small boat will speed more than a big boat because a small boat has light mass and easy to get to move quickly when the wind blows. While a big boat will speed normal or little increase speed because of weight because it will be due to the air pressure blows against the sails which they are attached to the boat.
Equipment: gutter trough with water, electric fan, styrofoam sheeting, exacto knife, toothpicks, stop watch, digital video camera, balance to measure mass
problem: What is the relationship between the mass of the sail and the velocity of the boat?
Procedure: You just need
to do this method of step for
procedure:
- Create a small boat out of the styrofoam and toothpicks.
- Test the boat in the trough (rain gutter).
- Change one variable and test each change three times. Take
digital footage of each trial. Put a sign in the picture to identify
the trial. Also put a meterstick in the picture so you can
calibrate the video.
- Use the stop watch to record the time for each trial run. Record your data.
- Analyze the data (make graphs). Calculate the velocity for each trial run, and then calculate the average velocities.
- Show the relationship between the variable and the velocities you calculated (make a graph).
- Analyze the video clip using Logger Pro.
- Write a report on my investigation.
V= d/t which the formula is stands for
Velocity. You just put the
number of Average Time (Ave t) ex: 8.87sec to divide by length of
distance is 225cm. You will find the answer for velocity is
25.4cm/s. This is a process to find the answer that is how I
figure out for velocity.
d= 225 cm V=d/t
d= 225 cm V=d/t
| Boat |
Mass |
1st
Trail |
2nd
Trail |
3rd
Trail |
Ave t |
Velocity |
| Boat 1 |
3.60g | 0:09.20
sec |
0:08.97
sec |
0:08.45
sec |
8.87s |
25.4cm/s |
| Boat 2 |
8.40g |
0:05.22
sec |
0:07.74
sec |
0:08.54
sec |
7.17s |
31.4cm/s |
| Boat 3 |
11.55g | 0:05.59
sec |
0:07.21
sec |
0:07.70 sec | 6.83s |
33.0cm/ |
*Graph of
Relationship between Velocity and Mass* It looked like its a
linear graph because the mass is increasing to make the velocity goes
up and up. Discussion of my observations and the date and the relationship about this graph. I noticed that the small boat is moving very slow while the big boat moves speed. Look at the evidence in my data chart already provided the answer for find an average time and velocity. Now I look at my graph. I found that itself is a linear equation graph because the line is a straight with an increase the speed, distance, and mass. *For your information, most of the times the scientisits are thrilling when they were clear up with their datas and if they saw any graph gives an answer is a linear equation graph. It means it is a good data and very produce of experiment success.*
Video Analysis: Big Boat's Graph looks like this:
Video Analysis: Small Boat's Graph looks like this:
Analysis on Movie of Sailboat... click here -> See movie clip here.
Results: I noticed that the small boat is moving very slow while the big boat moves speed. Look at the evidence in my data chart already provided the answer for find an average time and velocity. Now I look at my graph. I found that itself is a linear equation graph because the line is a straight with an increase the speed, distance, and mass. *For your information, most of the times the scientisits are thrilling when they were clear up with their datas and if they saw any graph gives an answer is a linear equation graph. It means it is a good data and very produce of experiment success.*
Restate and Evaluate the hypothesis: This data has not supported our hypothesis predicted that a small boat will speed more than a big boat because a small boat has light mass and easy to get to move quickly when the wind blows. While a big boat will speed normal or little increase speed because of weight because it will be due to the air pressure blows against the sails which they are attached to the boat. Because look at the data, the velocity is increased with the higher mass. If I measure an exactly numbers of mass, speific datas, or else; it will perhaps be answer little different results. Could be the velocity decreases with the higher mass or lower mass. As long as I see the proof of data shows us that our hypothesis is not supported by this data.
Question for Y'all! What if we use a metal of can to make a sailboat? And what would it happens?
I think it would be more exciting to
test on this because a metal of can could be a heavy weight or can
float when an eletric fan blows the air pressure against the metal of
can sailboat.
