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## Lab

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# Lab PHY 2048

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Vectors
COURSE
General Physics 1
PROF.
Grigoriy Kreymerman
TYPE
Class Notes
PAGES
3
WORDS
CONCEPTS
Physics
KARMA
25 ?

## Popular in Education, Physics

This 3 page Class Notes was uploaded by Avatar Notetaker on Monday October 10, 2016. The Class Notes belongs to PHY 2048 at Florida Atlantic University taught by Grigoriy Kreymerman in Fall 2016. Since its upload, it has received 6 views. For similar materials see General Physics 1 in Education, Physics at Florida Atlantic University.

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Date Created: 10/10/16
Experiment 2 Acceleration due to gravity Avatar Bhola 9/14/2016 Section: 009 Purpose:  To measure the acceleration of a falling object. The only force acting on the object  should be the gravitational force. Theory: The mass of an object dropped above ground, where air resistance is neglected, is called a free fall. The only force that is acted upon the object should be the gravitational force, which is  h= gt 2 defined as ma. The Theory can be described as   2 , where h = height, g = gravity, and t 2h = time. The equation can be rewritten as,= 2  , where g can be determined by finding the  t height and time.  Method: 1.  The student will measure the mass and the diameter of the big and small ball and record   them.  2.  There will be an apparatus set up so student can drop the ball at 5 different points. They  must measure the height of each point. The ball will hit a timer at the button of the floor.  The timer will measure the most accurate period of time between the max height point  and the bottom of the floor.  3. Next, the students must plug thee timer into a computer and open the software, PASCO  850, to record the time and the height. 4. To set up the timer for the software, the student must go to hardware setup and choose  “free fall adapter”. 5. After the hardware is correctly set up, the students will Data Summary and check off the  acceleration box. 6. Then, the students will click on the table icon and set up their table. 7. When the table is all set up, the students will click on “preview” and start dropping the  ball. If the students is satisfied with their run, they will click on the check button and  continue with the other runs.   8. If the students are done with their runs, then they will create an h vs t^2 graph. 9. Click on the calculator icon and calculate the time of each run squared.  10. Later, put the t^2 data into the same table with all of the other data.  11. Next highlight t^2 data and click on “Apply selected curve fits” in the graph tool bars. A  text box that says Linear: mx + b should appear, click on it. The linear line of best fit  should appear on the graph. Record all the findings.   Experiment 2 Acceleration due to gravity 12. Finally, create a text box, and type all of your groups information on their. When that is  finished, print the table, graph, and text box all on paper and get it checked off. Conclusion:  After conducting the experiment we’ve found out that mass is negligible when an object is free  falling above the ground. According to the data, when we calculated the acceleration all of the  findings were very precise. Each run calculation were in the same range. When we calculated the percent error for each ball they were less than a percent error. Also, the formula we used to  calculate the gravity for each run did not ask for the mass of the object.  Moreover, the graph for  the experiment shows the object of the ball falling at a constant rate. Since it is a height versus  time^2 graph the slope represents the acceleration. If the balls dropped at a faster rate than the  other, then there would be a curve inside the graph. Unfortunately not all experiments will have  the exact results. Some human errors that may occur could come from measuring the balls  dimensions incorrectly, not utilizing the software properly, or some calculations errors. The  software does measure the ball impact more accurate than a person, but the software may not be  perfect. The experiment was also conducted in an area where the air resistance was effecting the  balls’ drop. The data shows that one ball dropped faster than the other.   Experiment 2 Acceleration due to gravity Discussion Questions   1. The m (the slope) in the graph represent the acceleration of the ball, where m = h/t^2.  Then, the b represents the y intercept in the graph where b = h. 2. According to the experiment data, the mass and the size of an object should not affect the  gravitational force of the object. When you look at the data the falling acceleration is  roughly the same. 3. If you are given the height and the time of the falling object it is possible to find the  period of time between the maximum height and the falling object. The major issue is the time will not be recorded accurately. You have to take in account the reaction time for the person to stop and start the stopwatch. If the object was dropped at a distance of 0.5 m  g= 2h then, you can use the  t2   formula to find the answer, which is around 0.3 s.  4. If the environment has no air resistance then all three objects should fall at same rate.  Mass is negligible if there is no opposing force against the gravitational force.  However,  when you take in account for air resistance the heaviest object will drop the fastest. The  opposing for from the air will go against the gravity. Conferring, to the formula F= Ma,  where mass is taken into account, the more mass the object has the greater the force the  object will have. When you take the net forces you will see the objects with the greater  mass will drop faster than the others.

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