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Determining g Lab Deliverable


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Students taking Regents Physics in Irondequoit High School have determained a way to calculate gravitational acceleration quickly and effectivelly. They preformered a lab in which they produced evidence of this.


In forming groups of three, the teams gathered a tape measure, stopwatch, and a foam ball. One group member stood on a stool while the other measured the distance the ball would be dropped from the member standing on the stool. The member dropping the ball uses the stopwatch to eliminate delay error once the ball was dropped. The team calculated the time it took for the ball to be dropped to the time it hit the floor. Using the time, the distance it fell and the initial velocity of 0 m/s, the students used the kinematic equation d=vit+1/2at^2 to determain the acceleration. Afterwords, they calculated their percent error to be 29.7%.


Using this method, now anyone can learn to calculate the gravitational acceleration of a falling object.


By: Ben, Sabrina and Clare

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irondequoit high school students have determined the acceleration due to gravety. 


in groups of 4 they gathered a tape measurer, a stop watch, and a ball. as they droped a ball from stand on a table .60 meters from the ground and another student determined the amount of time it took for the ball to hit the gound, and repeated this 2 more times. to determin the acceleration they used d= vit + 1/2at^2. in having d as 2.6m, t as .6325 s and vi as o m/s^2 they converted the equation to  be a= 2d/ t^2. later they calculated the percent error to be 32.5%.


Brittany Dano, Hannah Zachary, Brian Perkins, Angelo Heale

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Faith DeMonte

Nicole Morris

Danielle Spaker


Young physicists at IHS have calculated the acceleration due to gravity. How did they do it? By putting together a lab where they calculate the amount of time it takes for a ball to hit the ground from a set distance they can find the acceleration due to gravity. If one can find at least three out of the five variables; Initial velocity, Final velocity, Acceleration, Distance and Time.

We knew the initial velocity was zero, and the distance we measured, which was 260 centimeters (or 2.6 meters) and it took an average of about .67 seconds to hit the ground. The acceleration due to gravity according to this experiment would be 11.6 m/s2 with a percent error of 18%.

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Breaking News Gravity!

The young physicists at Irondequoit High School have calculated the acceleration due to gravity in a new experiment.

 To Find this they first measured the distance from the floor to the botttom of a ball. Then a person dropped the ball while timing it to figure out how long it would take. After three trials of this, they calculated the average of all three trials to find the accceleration. The students found out that the acceleration was 5.5m/s2. The accepted number is 9.81m/s2 and their percent error turned out being 43.9%. In the end the findings were considered inaccurate due to the high percent error.


By: Abbey Fox, Mitchel Zachary, Spencer Donoghue

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A young physicst at Irondequoit High School has calculated the acceleration due to gravity,g, in an innovative way. They started off their procedure by timing a nerf ball dropping from the ceiling. One person dropped the ball and timed, while the others recorded the results. After finding the acceleration due to gravity, d=vi(t) + (1/2)(a)(t), they calculated the percent error. They had a 60% error in their calculations. Although their calculations may be off they did a great assessing the acceleration.


Imani Davis

Sandra Esparza

Josh Merkel

Chanae Lyons-Orange


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adam kirchgessner

hannah halloran

oksana zubrzycka

The young physicists at Irondequoit have calcultated the acceleration due to gravity, the first step the students took were meausring the distance from the top of the ceiling to the floor which had a distance of 2.74 meters, they then used a Voit ball and dropped it to the floor and calculated the time that it took to hit the ground. THe average time was.71 seconds and since the distance was 2.74 m the group used the kinematic equation d=vi(t)+1/2at^2 which they then derived to 2d/t^2=a to get the acceleration. If the numbers the group collected are correct or close to being consistant the acceleration should of been 9.81m/s2 but this came to be untrue.  

The number the students should have got was 9.81m/s2 which is the gravitional pull to the center of the earth, the numbers the students got were 14.24m/s2, 7.76m/s2, 6.07m/s2 and 10.28m/s2. The percent error of the group was extremly high to start where it was 45% but then went downn to 20.89% to 38.12% and all the way down to 4.79%.  This lab showed how poorly the timer of the group timed. The percent error was so high was because of the possible unaccurate measurements from the ceiling to the ground as well as the possible inaccurate timing, any change in these numbers can totally change the gravitational pull and proved to be true.

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Breaking news, young physicists at Irondequoit High School have calculated the acceleration due to gravity in a novel manner. By using a ball, tape measure, and a stopwatch, they were able to perform this task through this procedure. First, they measured the distance from the ceiling to the floor which was 2.8 meters. Then, one person from the group stood on the table, holding the ball ready to drop it. To make the timing more accurate, the person dropping the ball would also time the ball took to drop. They performed three trials of this to gather a more accurate acceleration. To find the accerlation they used the physics equation: d=vit=1/2at^2. The closest accerlation they achieved was 10.2m/s^2


This method of determining maximum height had such a large percent error due to outside factors influencing the height. For example, all of our shoes had different height off the ground. The guys in our group had on sneakers and then the girls of our group had on uggs. Also, the timing each person did for the person who jumped was different each time. One time the person timing could've been late, messing up the data. A way to make this determination more accurate would to use pressure pads.

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History was made today at Irondequoit High School, three students determined the accleration due to gravity.  They named the constant accleration due to gravity "g".  The students discovered this after a series of experiments.  The first experiment they conducted involved examining the acceleration of a ball dropped from 2.8 metters.  After three trials the average time it took for the ball to reach the floor was .69s.  From here the students used kinematic equations to determine the acceleration of the ball was roughly 11.76 m/s2.  The students did however determine they had a 19.88% of error.  Never the less the students at Irondequoit highschool made a significant scientific discovery. 

Ian, Celeena, Riley    

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