Matt's Outside Accelerometer Lab

Run to the 25 meter mark (below to the left)

The x, y, and z accelerations vary because they peak a lot. They all are different because of the different increases and decreases in different directions and axises. The force graph is like the acceleration one, except for the fact that there are less peaks of increase and decrease and the peaks are a little more spread out. A relationship we see between the force and acceleration graphs is that when the x and z axis acceleration go up, the force went down and kind of matched the peaks of each other.



Hop to the 15 meter mark (below to the left)

When the graph peaked, that was when we were accelerating upward and forward, then repeating the process until we reach 15 meters. The force almost stayed the same, except for a few spots when the force went down and was not the same.



Run to the 15 meter mark then Walk to the 25 meter mark from there (below to the left)

There was a lot more acceleration when we were running to the 15 meter mark, than when we walked 10 meters to the 25 meter mark. There was more acceleration while we were running because we were going faster and acceleration more, then slowed to a walk for ten meters, then stopped completely once we got to the 25 meter mark.

Graphing Your Motion

33a. I think as we get farther away, the lines will get higher, and as we get faster the lines will get steeper.

My prediction was correct.

33b. I think it wil be easy at the beginning, but get more difficult as time goes on.


1. The Step 4 line was steadily increasing because we were steadily moving away. The Step 5 line was stopping and moving because we were staying still and then moving back.
2. If we got closer it would be going towards the bottom.
3. To match the line, you had to scoot back at a fast or slow pace.

33c. I think that all our lines will be different.


I think this will be extremely hard to do because the motion sensors we are using are super sensitive.


4. I was walking faster and it made a lot of weird peaks.
5. Velocity: the speed of something in a given direction
6. I didn't really know what to do to match this line. Our lines don't match the graph at all.
7. If it is a position vs. time graph, you need to move away at a slow steady pace, stay in the same place, then move toward the sensor quicker than before. If it is a velocity vs. time graph you need to move quicker, then stay the same, then slow down your movement.
8. On the acceleration vs. time graph, there are a lot more peaks in the graph than on the other two.
9. On the velocity vs. time graph, the acceleration points are when it goes up and it decelerates when it goes down.
10. On the acceleration vs. time graph, the acceleration points are when it goes up and it decelerates when it goes down.
11. Acceleration is the increase in the rate, speed, or velocity of something per unit of time.

The Moving Man

A. What number and unit are written directly under the moving man? Number 0 Unit Meters
Distance from Moving Man (reference point to)| House | Wall | Tree |
| 8 m | 10 m | 8 m |
Displacement from Moving Man (reference point to)| House | Wall | Tree |
| + 8 m | +10 m | -8 m |

What is the difference between an object’s DISTANCE and its DISPLACEMENT?

The distance only has an amount and a unit, displacement also has a direction.

What is the difference between an object’s SPEED and its VELOCITY?

Speed compares the distance it traveled to the time it took to travel that distance, and velocity compares the amount that the objects displacement (direction and distance) have both changed during a certain amount of time.

A) The unit of distance in the moving man is meters
B) The unit of time used in the moving man is seconds

At which of the two velocities did he move faster? 4 meters/sec

SPEED TIME DISTANCE COVERED
TRIAL #1 1 meter/sec (slower) 2 seconds
 2m
TRIAL #2 4 meter/sec (faster) 2 seconds 8m

TRIAL #1 ____2_____ meters divided by _____2_____sec = ________1_____ m/sec
TRIAL#2 ____8_____ meters divided by ____2_____sec = ________4______m/sec







1) EXPLAIN the difference in motion represented by a straight line and a curving line on a “distance vs. time” in terms of constant or changing speed.

When it is straight it is constant, when it curves it is changing.

2) Changing speed is called “acceleration” (speeding up) or deceleration (slowing down). Describe the shape of an acceleration line on a Distance vs. Time graph of acceleration.

The shape of the line has a lot of peaks. This is because it is always changing.

3) EXPLAIN the difference between the motion represented by a flat line and a sloping straight line in a “distance vs. time” graph.

A flat line means he is standing still. If it is sloping, it means he is moving forward or backward.

4) If the slope of a line on a “distance vs. time” graph is steep. What is different about the motion then when it is not steep?

If the line isn’t very steep that means he wasn't moving very fast.

A) CALCULATE the average speed/velocity between point B & Point C by finding the slope of the line between the 6th and 15th seconds (show work below)

10/-8 = 1.25 meters per second

B) Why is the line sloping upward to the right between the 2nd & 3rd second, but downward to the right between 6th and the 15th seconds?

Because he was moving away then he was moving closer.

C) During what two times did he stop moving?

Time 1: 3 seconds
Time 2: 16 seconds

Bias: Women's Brains

1. What is the general point that Gould is presenting?
That the scientist Broca is being biased in his test to see who’s brain is bigger: male or female.

2. What is the general evidence on which that conclusion is based?
He chose the “test monkeys” in favor of the male gender.

3. What is the gender of all the researchers producing those data and conclusions?
Mostly all of the researchers are males except for one female.

4. What weaknesses or problems with those data and their interpretation does Gould point out? Well, Broca gave the advantage to the males because he chose the taller and younger males while choosing the shorter and older women for the other side.


5. a) Name the one woman anthropologist mentioned who studied the subject of this essay. b) What did she find after proper correction of Broca's data? c) What were her conclusions from that finding?
a)Maria Montessori
b)She found that that the female’s brain was slightly bigger than the male’s.
c)Her conclusions were that women were “intellectually superior, but men had prevailed heretofore by dint of physical force.”


6. What conclusion does Gould reach about the central issue?
He says that he would rather label it “irrelevant and highly injurious.”

7. Make a general statement about the role of bias and assumptions in the collecting, processing, and interpretation of data in scientific studies.
If you want your studies to succeed so badly that sometimes it ruins everything because you collect data, process data, and interpret data only the way YOU want it.

8. What other kinds of bias can you think of that might influence observations and interpretations in science?
If it was a discovery that could be made and you would get money and fame, some people would be very tempted and consider it if not actually doing it.

9. Describe your initial feelings (about the subject, the author, etc.) after reading the first 4 pages.
I feel respect for the author because he states only the facts and he hasn’t taken a side or made it something personal instead of a science matter.

10. Describe your feeling after finishing the entire article.
Like said before I feel respect for the author for not taking a side and keeping it a science matter, and not taking it to a personal level, while Broca and Montessori were biased about it and actually let science do the work.