Astronaut Question

The reason it looks like astronauts are floating when theyre in orbit of the earth is beacuse theyre constantly falling in orbitof the earth..not because theres zero gravity. There actually is gravity but the amount is not low enough to cause the floating depicted in pictures of astronauts floating in space. This floating sensation is similiar to one of a person floating when skydiving depicted in this video. http://www.youtube.com/watch?v=I2ciOr6l1ss

Acceleration

Acceleration is in the change in velocity. That includes if its increasing or decreasing

Average Velocity from Home to School

I went on google maps where it sais that itd take somewhere around 22 minutes for me to get to school and its a total of 14 miles distance wise. To figure out my average velocity I first converted my 22 minutes to .37 hours and then divided the total distance by time which comes out to be 37.84 miles per hour for my total velocity for my trip to school.

Pendulem Lab

1) Hypothesis- The amount of time it takes for the pendulem to swing back and forth decreases when the length of the pendulems string is shortened

2) Methodology- We first collected our materials which included a string, a small weight, and a stopwatch. After collecting these we tied one end of the string to the weight and the other to the ceiling. We than pulled the weight up at a certain angle and let it swing 10 times and recorded how long it took with our stopwatch. We went through this process a total of 7 times and each time we progressively made the string shorter and shorter. We recorded all of our information and then made a Time vs. Length graph based off of our data which finally drew us to our conclusion.

3)Information recorded-
length: (1)  0.99m ;    (2) 1.06m ;      (3)1.18m ;    (4)1.26m ;     (5)1.31m ;   (6)1.34m ;    (7)1.68m
time: (1)  21.14s ;    (2) 21.55s ;     (3) 22.4s ;   (4)23.15s ;     (5)23.68s ;  (6)23.84s ;   (7)26.22s


4) Graph

5) Conclusion- By collecting our data and graphing it we came to the conclusion that as the string connecting the weight and ceiling is shortened, the time in which it takes to swing 10 times shortens so therefor time is directly proportionate to length. This is proved by when the length of the string was 1.06 m the time it took was 21.55 s; when we shortened it to .99 m the time shortened to 21.14 s.