davv-tem3

= Using the Pulley =

http://www.hudsongoodsblog.com/?tag=old-farm-pulleys

Experimental Design:
 My experiment is to be conducted with the power of pulleys. My experiment will be conducted inside my garage in an open space to work. I will have five people doing the experiment, completing two trials each. The tests will be done in a safe environment where there is only a slight chance of getting hurt.  The data will be recorded on google docs on my computer inside my house. I will write down the data to each test. This way I can make sure that when I transfer it on to the computer, I don’t record the data wrong and I won’t have to repeat any tests. I will put the data on my google spreadsheet and put my pictures that I will take on a separate google document.

Materials List:
1. 2,8ft. 2x4 2. Piece of ply wood 3. Pulley 4. Wooden or Metal crank 5. 5 Gallon bucket of water 6. Box of nails 7. Box of screws 8. Saw 9. Hammer 10. Screw driver

Detailed Procedure:
1. Get stop watch, camera, and pulley system ready to test. 2. Load the forty pounds of weight onto the pulley system. 3. Do the manual pulley test using, five people, twice. Time and Record Results. 4. Repeat step 3, five more times. 5. Do the crank pulley test using five different people, twice. Time and Record Results. <span style="background-color: transparent; color: #d90fe3; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">6. Repeat step 5, five more times. <span style="background-color: transparent; color: #d90fe3; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">7. Put the data on Google Docs spreadsheet, completing the experiment.

=
<span style="background-color: transparent; color: #a1eb25; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;">1. The number of pulleys may effect the mechanical advantage of which the pulley can pull. The higher it is the easier it is going to be to lift the weight. So if you have less pulleys there will be less restriction of the pulley and how much it can lift. ===== <span style="background-color: transparent; color: #a1eb25; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;">2. The pulley was created by a man named Archimedes. He made many known machines like this one used today. He created machines like the lever, the pump, and pulleys. He wrote to King Hieron that with enough pulleys he could move the world. So King Hieron challenged him to move a large ship in his army that would take many men to move. So when the day came the ship was loaded with a full cargo and full passengers Archimedes full one cord and drew the sip forward. <span style="background-color: transparent; color: #a1eb25; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;">3. The pulley I am making is a fixed pulley. The pulley is usually attached to a ceiling or wall making it unmovable. With this kind of pulley though it takes more effort to lift the pulley. With the kind of pulley not moving it acts as a first class lever ,but the lever is a rope. <span style="background-color: transparent; color: #a1eb25; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;">4. A elevator is kind of like a pulley. The elevator has a wheel just like the pulley system that works the rope on the wheel. Instead of the wheel on making the weight go in one direction in moves it in a circular motion in order for it to keep moving. <span style="background-color: transparent; color: #a1eb25; font-family: Times New Roman; font-size: 16px; line-height: 0px; overflow: hidden; text-decoration: none; vertical-align: 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 http://www.explainthatstuff.com/how-elevators-work.html== References == 1.<span style="background-color: transparent; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;"> Feldman, Vladislav. "The Pulley System." ORACLE' Think Quest. Education Foundation, 14 Sept. 2011. Web. 18 Jan. 2012. <http://library.thinkquest.org/27948/pulley.html>. <span style="background-color: transparent; color: #808000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">2. "PULLEYS." Internet Activities Center. Web. 19 Jan. 2012. <http://www.swe.org/iac/lp/pulley_03.html>.3. "Pulley Basics." SUMMERLIFT. Web. 19 Jan. 2012. <http://www.the-office.com/summerlift/pulleybasics.htm>.4. Woodford, Chris, et al. Cool Stuff and how it works. New York, NY: Doring Kindersley Limited publishing, Inc., 2005. Print. == Results == == Data Table: == media type="custom" key="12298152"

Conclusion:
<span style="background-color: transparent; color: #f20a03; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;">The original purpose of this experiment was to find out what is the best way to lift large amounts of weight. Each method was tested ten times with five people doing each method two times. The results of the experiment were that pulling with your hands is the fastest way to lift ten pounds with an average time of 3.45 seconds. The method of cranking had an average time of 23.90 seconds. The fastest way to lift the ten pounds is lifting by hands. Each method was tested ten times with five people doing each method two times.

Discussion:
<span style="background-color: transparent; color: #12ed27; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;"> My hypothesis was that pulling by hand would be the fastest way to lift ten pounds. My results do support my hypothesis. There is a relationship between the independent and dependent variables. There were several patterns, in my data.As the age of the person increased, the pulling time increased.. I The tests I did went smoothly with minor problems. I had to change the weight and the cranking system because they kept breaking. We also had to redo trials several times because my timer kept freezing up in the cold weather.

<span style="background-color: transparent; color: #12ed27; font-family: Times New Roman; font-size: 16px; text-decoration: none; vertical-align: baseline;"> If I could improve my experiment, I would have tested more people. I would have more methods of lifting the weight. I would have built a better set up so the pulley system could have held more weight. Finally I could have managed my time better if I had had the materials sooner than I did. Also, I would have looked into better ways to lift larger amounts of weight. An interesting future study might involve looking into different shapes for pulley systems.