The purpose of the Picket Fence Free Fall Lab was to examine the acceleration of objects as they fall to earth. During free-fall the only force that should be acting upon the object is the earth’s gravitational pull (9.8 m/s/s), therefore the velocity of the object should always equal 9.8 m/s/s. In this lab the picket fence was dropped repeatedly through a photogate connected to Logger Pro, which allowed the fence’s acceleration and velocity to be recorded and graphed.

The results of the experiment confirmed the theory that objects will fall with a constant acceleration equal to g (9.8 m/s/s). During the first 5 runs, the photogate was dropped from the same height and had an average acceleration of 9.762 m/s/s-- which is extremely close to the expected value of 9.8 m/s/s. Even runs during which the photogate was dropped from a higher height or thrown downward (runs 6 and 7), had an average acceleration of 9.741 m/s/s. This proves that none of these circumstances had any affect on the acceleration of the fence and that only gravity influenced its fall. The fence was thrown upward during the last run (run 8) and had an acceleration of -6.470 m/s/s, showing that the force of gravity was slowing it down as it traveled upward.

The results of this experiment were extremely consistent. Out of the first 7 runs, the acceleration only ranged by 0.198 m/s/s. The percent error between the average acceleration in the first five runs and the accepted value for gravity was only -0.388%, and the average acceleration of runs 6 and 7 only had a -0.602% error. Therefore, the data collected was very accurate. We did not experience any major difficulties in the lab other than throwing the fence up through the photogate straight.

...Carmen Ortega
ENG111-06
Jyly,7 2013
Personal Narrative
FreeFalling
It was an early Sunday morning on Delta flight 6767 that departed Huntsville, Alabama at 07:20 on a sunny April morning when I made the decision to jump. Obviously I wasn’t considering jumping out of the short one hour and five minute commercial flight from Huntsville International Airport to Hartsfield-Jackson Atlanta International Airport, but I had made up my mind. Quite a few months before this particular day, my friend had mentioned her desire to go skydiving. My response to her enthusiasm and set in stone decision to do such a thing matched the reactions I received when I told my close friends and family that I was at a Skydiving Center in Miami and prepping for a jump. However what made me decide to jump on this particular day was a strong feeling of claustrophobia, most people would sum this up to being on a 70 passenger aircraft, which is considered small in the airline industry, at least for a commercial airline it was pretty small. I though was feeling claustrophobic in the sense that I was being trapped by all these limitations, from which I was unable to release myself. Once we had landed in Atlanta, I pulled out my blue Samsung flip phone to send my friend a text message, and told her how I had decided I would go skydiving with her if she hadn’t already gone ahead and done it. I pressed send, and about five seconds later got a confirmation that the text...

...FallingObjects
Name: __________________________ Hour: _____ Score: __________
Directions: Solve the following problems. Make sure you use all of the problem solving guidelines AND remember units!!
1. What is the equation for the velocity of a fallingobject?
2. What is the equation for finding distance of a fallingobject?
3. What are the unit for velocity? _____________________________________
4. An apple drops from a tree and hits the ground in 1.5s. What is its velocity just before it hits the ground?
5. On a distant planet, a freefallingobject has an acceleration of 20m/s2. What velocity will a body dropped from rest on this planet acquire in 1.5s?
6. A skydiver jumps from a helicopter hovering at high altitude. If there were no air resistance, how fast would she be falling 12s after jumping?
7. An apple drops from a tree and hits the ground in 1.4s. How FAR does it fall?
8. On a distant planet a freely fallingobject has an acceleration of 23.8m/s2. What vertical distance will an object dropped from rest on this planet cover in 1.8s?
9. What vertical distance will a body dropped from rest fall in 12s of free fall?
10. What is the...

...Research
An object that is falling through the atmosphere is subjected to two external forces. The first force is the gravitational force, expressed as the weight of the object. The weight equation which is weight (W) = mass (M) x gravitational acceleration (A) which is 9.8 meters per square second on the surface of the earth. The gravitational acceleration decreases with the square of the distance from the center of the earth. If the object were falling in a vacuum, this would be the only force acting on the object. But in the atmosphere, the motion of a fallingobject is opposed by the air resistance or drag. The drag equation tells us that drag is equal to a coefficient times one half the air density (R) times the velocity (V) squared times a reference area on which the drag coefficient is based.
The motion of a fallingobject can be described by Newton's second law of motion, Force = mass x acceleration. Do a little algebra and solve for the acceleration of the object in terms of the net external force and the mass of the object (acceleration = Force / mass). The net external force is equal to the difference between the weight and the drag forces (Force = Weight - Drag). The acceleration of the object then becomes acceleration = (Weight - Drag) / mass. The...

...her with long, slow strokes, and her sad eyes gazed into mine. Her coat felt more silky than usual. Of course, I did not notice any of these qualities until that day, which made me all the more sad about leaving her.
The entire day was like that: a powerful awakening of whom and what I would truly miss. I became sentimental about saying good-bye to many people I had taken for granted—the regulars who came into the restaurant where I worked, the ones I never seemed to find time to speak with. I had to leave all of my friends and also the classmates I had always intended to "get to know someday." Most importantly, I would be forced to say farewell to the ones who raised me.
All at once, the glorious hype about becoming independent and free became my sole, scary reality. I began to feel the pressure of all my big talk about being a big shot going to a big-time school. Big deal. I had waited so impatiently for the day to arrive, and now that it finally had, I felt as if I did not want to go. I suppose that goes with the territory of enrolling in a university six hours from home.
Upon my decision to do so, in fact, all of my personal problems had seemed to fade. I didn't care; I was leaving. I wanted to make it clear to everyone that I wanted to go—and by God, I was ready. Then the day came, and I wondered if I was honestly ready to go.
My dad and stepmom were taking me to school, but first I had to say good-bye to my mom. No one ever said divorce was...

...Elizabeth Booth
Descriptive Essay
FreeFalling
I stand here, on the edge, peering down into Mother Natures’ mouth. The sounds of the birds and trickling water give me no strength, for as I peer down into the crystal clear the only sound I hear is adrenaline forcing my heart to pump blood to my ears. Even the fish know I am afraid. They open and close their mouths, laughing at, almost mocking my fear. My toes dig their way into the crumbles of the damp earth. The pressure is really on when I look at my friends surrounding the water hole death trap that I am supposed to jump into. They heckle me, wishing for their own adrenaline rush from watching me partake in a danger that they themselves are too cowardly to pursue. I allow the scent of the dirt and the sweet grass that is surrounding the bank to fill me with courage, and remind me of my place here in nature. After taking a final glance at the rocks at the bottom of the creek waiting to smash my bones to a pulp, I grab the rope and tuck my knees to my chin in one quick impulse. The wind whistles in my ears as I fly through the air. Tiny bright stars shine behind my tightly closed eyes. There is one final burn against my palms as I release. The fall lasts only seconds until, at last, wetness slaps my thighs like an old friend pats you on the back, glad you have finally arrived. Finally, after falling deeper and deeper into the belly of my Mother Earth, I rise...

...Candidate
Name:
Riddhi
Chaknalwar
Candidate
Number:
001226038
May
1,
2012
ACCELERATION
OF
AFREE
FALL
Aim:
To
calculate
the
acceleration
of
gravity
(������)
of
free
fall
of
a
body
on
earth.
Apparatus
Required:
• • • • • • Light
gates
Ruler(
±0.001
m)
String
Freefallingobject(cylindrical
tube
taken)
Stand
Weight
to
support
the
string
VARIATION
OF
LENGTH
WITH
TIME
S.No.
1
2
3
4
5
6
7
8
9
10
Length
of
the
Time
2
(±
string
(
±
0.001
m)
Time1
(±
0.0001s)
0.0001s)
0.800
0.900
1.000
1.100
1.200
1.300
1.400
1.500
1.600
1.700
0.0085
0.0081
0.0076
0.0072
0.0071
0.0068
0.0066
0.0062
0.0062
0.0058
0.0083
...

...object's weight. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus a column of fluid, or an object submerged in the fluid, experiences greater pressure at the bottom of the column than at the top. This difference in pressure results in a net force that tends to accelerate an object upwards. The magnitude of that force is equal to the difference in the pressure between the top and the bottom of the column, and is also equivalent to the weight of the fluid that would otherwise occupy the column. For this reason, an object whose density is greater than that of the fluid in which it is submerged tends to sink. If the object is either less dense than the liquid or is shaped appropriately (as in a boat), the force can keep the object afloat. This can occur only in a reference frame which either has a gravitational field or is accelerating due to a force other than gravity defining a "downward" direction (that is, a non-inertial reference frame). In a situation of fluid statics, the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the
with the clarifications that for a sunken object the volume of displaced fluid is the volume of the object, and for a floating object on a liquid, the weight of the displaced liquid is the weight of the object.
More tersely:...

...Fence Lab (CP) without the parachute
Purpose:
The purpose of this experiment is to verify the acceleration due to gravity using the picket fence with a photogate, LabPro and LoggerPro software by measuring it with a precision of 0.5% or better.
Theory:
All objects, regardless of mass, fall with the same acceleration due to gravity assuming that there is no air resistance. Objects thrown upward or downward and those released from rest arefalling freely once they are released. Any freely fallingobject experiences acceleration directed downward, regardless of the direction of its motion at any instant. The symbol “g” is used for this special acceleration at the Earth’s surface. The value of g is approximately 9.8 m/sec2. Since we are neglecting air friction and assuming that the free fall acceleration is constant, the motion of a freely fallingobject is equivalent to motion in one dimension under constant acceleration. Therefore the constant acceleration equations can be applied. Objectsfalling downward only under the influence of gravity can be graphically analyzed with a displacement versus time graph shown by a parabolic curve described in graph 1. This graph shows that as the object is falling, the displacement it travels each second is greater than the prior second. This graph can...