physics
hey my computer is being retarded and not letting me e-mail...so i'm pasting my physics lab here so i can copying it later...read it if you're extremely bored...i'm soo jealous if you are..
Lacey Ro******
6 September 2005
Period 2B
Some-Psycho-Stalker-Circling-the-School-Sir!
Please-Assist-Us! Lab
Abstract
In this lab our group will test how we can find the constant velocity of Mr. McHarg’s vehicle with limited materials and physics. The main formula is one for average velocity, which is change in position over change in time or displacement over time interval. Through this lab I hope to learn how to efficiently collect data and use that data to find the average velocity of objects with a constant velocity. Our table’s hypothesis is that with three people timing the same Location (that we mark ourselves) for three trial will yield the data we need to find the average velocity of Mr.McHarg’s car, which we think is going to going under thirty miles per hour.
Materials
Ø Four people
Ø Three stop-watches
Ø Chalk
Ø Meter-stick/Yardstick
Ø Pen/Paper with a hard surface to write on
Procedures
1) The first step to starting your lab is to gather the materials listed above and make sure your timers work properly. Then, have one person draw out a blank data table on a piece of paper and assign three people in your group as timers and one person as the recorder. In our group we also assigned each timer as Person 1, Person 2, or Person 3 as to keep one person’s time identifiable. We also made our data table as to accommodate the data for three trials per Location of which we also had three.
2) Now you are ready to move outside. Take your materials to the location in which the experiment is taking place (preferably a straight road adding turns would make it almost impossible to find constant velocity) speed bumps, however, can be overcome.
3) Now your group needs to find an identifiable starting point and mark that point with your piece of chalk. Your groups also needs to decide whether or not they think which combination of short or long times with short or long distances would provide the most accurate answers. Our group decided on three location points at fifteen meters apart at 15m, 30m, and 45m.
4) Add any new decisions and information to you data chart for which you should have one person recording on. DO NOT forget to write down any data that could affect your conclusion! Also try to measure your distance in a straight line it allows more accuracy.
5) Once your group has decided on what distances they would like to do, you must begin at your starting point and measure them out with your meter stick. Mark each meter so you have reference points and once you get to a distance in which you are going to time, mark it all the way across the street and write the number it is so it is easily identifiable.
6) Once your group has marked all of its timing points you all must decide how you are going to time each distance. Such as how many people will you have at each timing distance and at which point. Our group decided to have all three timers at the same distance point and that we would each time Mr. McHarg’s car at that point three times before we moved on to the next point. Your group must also designate a part of the car that can be identified with to stop or start the timers.
7) When this is organized all group members go to their first point. The recorder goes to the starting point (0 meters) so that she/he can communicate to the rest of the group when Mr. McHarg’s vehicle has crossed the starting line. The other three group members wait at the first distance point. Timers must make sure their speed watches are set on 0.00 seconds. If not push Reset.
8) Then, when Mr. McHarg’s gas efficient part of the car crosses the groups’ starting line the recorder signals the timers to start their watches. Then, the timers keep their watches going until Mr. McHarg’s car crosses the first distance point (in our case 15 m) with the same part of the car and then the timers stop their watches.
9) Then, while the car is circling back around the school have your recorder record all the times of each person with their appropriate “Person”, “Location”, and “Trial”. Once that is done go back to your places.
10) Repeat steps eight and nine two more times in the first distance point. Then, the three timers move to the second distance point (in our case 30 m) while the recorder remains at the starting line (0 meters).
11) Now, repeat steps eight through nine except instead of the timer stopping their watches at the first distance point, the timers must wait until Mr.McHarg’s vehicle has gotten to the second distance point (in our case 30 m) before they can stop their watches and communicate their times back to the recorder.
12) Once your group has completed three trials of the second distance you may move on to your last and final distance point.
Lacey Ro******
6 September 2005
Period 2B
Some-Psycho-Stalker-Circling-the-School-Sir!
Please-Assist-Us! Lab
Abstract
In this lab our group will test how we can find the constant velocity of Mr. McHarg’s vehicle with limited materials and physics. The main formula is one for average velocity, which is change in position over change in time or displacement over time interval. Through this lab I hope to learn how to efficiently collect data and use that data to find the average velocity of objects with a constant velocity. Our table’s hypothesis is that with three people timing the same Location (that we mark ourselves) for three trial will yield the data we need to find the average velocity of Mr.McHarg’s car, which we think is going to going under thirty miles per hour.
Materials
Ø Four people
Ø Three stop-watches
Ø Chalk
Ø Meter-stick/Yardstick
Ø Pen/Paper with a hard surface to write on
Procedures
1) The first step to starting your lab is to gather the materials listed above and make sure your timers work properly. Then, have one person draw out a blank data table on a piece of paper and assign three people in your group as timers and one person as the recorder. In our group we also assigned each timer as Person 1, Person 2, or Person 3 as to keep one person’s time identifiable. We also made our data table as to accommodate the data for three trials per Location of which we also had three.
2) Now you are ready to move outside. Take your materials to the location in which the experiment is taking place (preferably a straight road adding turns would make it almost impossible to find constant velocity) speed bumps, however, can be overcome.
3) Now your group needs to find an identifiable starting point and mark that point with your piece of chalk. Your groups also needs to decide whether or not they think which combination of short or long times with short or long distances would provide the most accurate answers. Our group decided on three location points at fifteen meters apart at 15m, 30m, and 45m.
4) Add any new decisions and information to you data chart for which you should have one person recording on. DO NOT forget to write down any data that could affect your conclusion! Also try to measure your distance in a straight line it allows more accuracy.
5) Once your group has decided on what distances they would like to do, you must begin at your starting point and measure them out with your meter stick. Mark each meter so you have reference points and once you get to a distance in which you are going to time, mark it all the way across the street and write the number it is so it is easily identifiable.
6) Once your group has marked all of its timing points you all must decide how you are going to time each distance. Such as how many people will you have at each timing distance and at which point. Our group decided to have all three timers at the same distance point and that we would each time Mr. McHarg’s car at that point three times before we moved on to the next point. Your group must also designate a part of the car that can be identified with to stop or start the timers.
7) When this is organized all group members go to their first point. The recorder goes to the starting point (0 meters) so that she/he can communicate to the rest of the group when Mr. McHarg’s vehicle has crossed the starting line. The other three group members wait at the first distance point. Timers must make sure their speed watches are set on 0.00 seconds. If not push Reset.
8) Then, when Mr. McHarg’s gas efficient part of the car crosses the groups’ starting line the recorder signals the timers to start their watches. Then, the timers keep their watches going until Mr. McHarg’s car crosses the first distance point (in our case 15 m) with the same part of the car and then the timers stop their watches.
9) Then, while the car is circling back around the school have your recorder record all the times of each person with their appropriate “Person”, “Location”, and “Trial”. Once that is done go back to your places.
10) Repeat steps eight and nine two more times in the first distance point. Then, the three timers move to the second distance point (in our case 30 m) while the recorder remains at the starting line (0 meters).
11) Now, repeat steps eight through nine except instead of the timer stopping their watches at the first distance point, the timers must wait until Mr.McHarg’s vehicle has gotten to the second distance point (in our case 30 m) before they can stop their watches and communicate their times back to the recorder.
12) Once your group has completed three trials of the second distance you may move on to your last and final distance point.