Free Fall

Sarah Hansen, Ally Hakeem, Kelsey Hill

An object falling from a certain height pulled down by a gravitational force only is free fall. This object has no force upon it due to air resistance. For example, if there is a vacuum pump to suck all the air out of a chamber, a feather and rock will land at the same time. The constant acceleration of an object is due to gravity only. Free fall has changing velocity. Galileo is the one who discovered this free fall explanation.

http://www.youtube.com/watch?v=7gsmllyr5Gs- This is the link to our video of objects of different masses landing at different times
http://www.youtube.com/watch?v=EIt_Mvthp5s- This is the link to our video of objects of different masses landing at the same time
http://www.youtube.com/watch?v=LBWtj6ID3V8&feature=related- This is the link to our video of objects of different masses landing at the same time

Calculations for acceleration:
D=1/2at^2
10.7=1/2a(1.51)^2
10.7=1/2a(2.2801)
10.7=1.14005a
10.7/1.14005=a
a=9.4m/s^2
This is very close to 9.8m/s^2, therefore, a 90 degree angle for an object will always accelerate at 9.8m/s^2 or very close to it.


http://www.youtube.com/watch?v=KDp1tiUsZw8- This is link to a video of free fall taken on the moon
http://www.youtube.com/watch?v=hKO1VkujAK8- This is a link to a video of free fall of a basketball being thrown from an amusement park ride
http://www.youtube.com/watch?v=CpJp2HlWUEk- This is a link to a video of objects of different masses landing at the same time