• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

This lab will test the effects of the surface area factor on acceleration due to gravity.

Extracts from this document...

Introduction

Physics 20IB: Accelerated Motion in Free-fall Lab Design: Problem: - What are the effects of surface area in acceleration due to gravity? Experimental Design: - This lab will test the effects of the surface area factor on acceleration due to gravity. Pieces of paper will be dropped down and timed from high point of release, where the release point will be constant to reduce human timing/reaction errors. The paper will be folded proportionally (always half of the previous) to manipulate the surface area; five trials will be recorded - four of the closest results will be put into use as data for this lab. Hypothesis: - The time of descent of the paper will get faster as the surface area of the paper decrease. The increase and decrease in the time of descent should be caused by natural factors such as air resistance acting towards the surface area of the paper in the test environment. Variables: - Manipulated Variable: Surface Area The surface area of the paper will be measured with a ruler before each trial takes place. The surface area will always be measured to the nearest 0.01cm by using a ruler measuring in millimeters and converting it back to centimeters. ...read more.

Middle

o Dimensions: o Percent Uncertainty for each =0.469...% and =0.730...% o Values multiplied and Percent Uncertainty added =72.95cm2 and 0.469%+0.365%=1.199% o Final Absolute Uncertainty: 3. Average Time - Paper Size Data Table: Paper Size: Average Time of Descent0.35s 1 Full Paper (583.62cm2�2.44cm2) 6.25s 1/2 Of Origin Paper (291.81cm2�cm2) 4.69s 1/4 Of Origin Paper(145.91cm2�cm2) 3.61s 1/8 Of Origin Paper(72.95cm2�cm2) 2.30s 4. Theoretical Average Time - Paper Size Data Table: *Assumed tested in a perfect vacuum, mass would not matter became there will be no external forces interacting with the paper Paper Size: Time of Descent 1 Full Paper (583.62cm2�2.44cm2) 1.03s 1/2 Of Origin Paper (291.81cm2�cm2) 1.03s 1/4 Of Origin Paper(145.91cm2�cm2) 1.03s 1/8 Of Origin Paper(72.95cm2�cm2) 1.03s Calculations: Acceleration due to gravity: -9.81m/s2 Formula To Calculate Final Velocity of Paper: Vf2 = Vi2 + 2ad Vf= = 10.100....m/s Time Used For Paper to Drop from 520cm (5.20m): d = 5.2=10.100/2 (t) > t=1.02970297...s t=1.03s - Mass is not accounted in the theoretical result, because mass of objects do not account as a factor in a vacuum. Graphical Comparison of Physical and Theoretical Results: 5. Trends from the Comparison of Physical and Theoretical: Results Physical Theoretical Difference* Ratio& Size: Full 6.26s 1.03s 5.23 6.08 Size: 1/2 4.67s 1.03s 3.64 4.53 Size: 1/4 3.66s 1.03s 2.63 3.55 Size: 1/8 2.30s 1.03s 1.27 2.23 - ...read more.

Conclusion

Improvement to Experimental Procedure The first problem presented in the evaluation of procedure could have easily been fixed with the access to printer paper at the school, the printer papers would have resulted a more accurate time because there will be no holes in them. The second problem could have been solved by simply adding a piece of tape on the paper to prevent the unfolding during its air time, we would also improve this step by keeping the mass of the tape �0.01g to keep a constant mass. The third and fourth problem presented in the evaluation of procedures can be summarized as one, the third problem could be very difficult to solve based on the limited equipment we have, but I believe the best solution to this problem is to perform the experiment in a "closed" system, meaning that it's done inside a controlled environment, the area, air flow and pressure will remain the same, this test apparatus can be found at the back of the school's science lab where students usually perform their chemistry experiments, I would add a support stand at the bottom where I can place the paper at a perfect angle parallel to the ground then release it quickly to start timing, this "closed" system would also solve the problem of the paper hitting the wall and give a more accurate over all time result. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Physics essays

  1. How does the mass of the paper helicopter affect the drop time of the ...

    Apparatus and Materials: 1. Printer paper 2. Scissors 3. Meter stick � .01 cm 4. Five paper clips: .7g each (�.1g) 5. Stop watch: (MyChron � .01 s) 6. Electric scale: � .1 g 7. Pencil Procedure: 1. Obtain a piece of printer paper and use a pencil to draw a helicopter shape (see figure 1 below).

  2. The purpose of this lab is to examine impact craters. Impact craters occur when ...

    Therefore the graph will be vs. , yielding 3 graphs and calculations. Before the graph, the averages of the trials at each height must be taken to yield a singular number to graph. Using this number, the averages will be put in the new natural log equations.

  1. Investigate the Size of Craters in Sand Due to Dropped Object.

    We also predicted that the volume of craters will also increase as the depth of craters increase. Apart from that, because we used slotted mass as our dropped object, it indicates that we will have constant diameter of the craters.

  2. Determination of g by freefall

    The uncertainties are calculated from the extreme lines obtained from the error bars on the graph. The accepted value for g= 9.81 which does not lie in-between the uncertainty values. The calculated % discrepancy in 2.5%. Evaluation From looking at the raw results obtained, I can say that this experiment

  1. Pendulum lab. The main purpose for this experiment is to find the factor that ...

    The graph above indicates increase in time (s) as the length of the string is gradually increasing, it is reasonable to say that two variables form a linear relationship between each other. The graph includes line of best fit, steepest fit, and least steep fit from the graph as drawn and the equation for each of the line.

  2. The Affect of Mass on the Time It Takes an Object To Fall

    This can be concluded because when the raw data was graphed on a set of axis, the best fit line was a power function where x was to the power of about -0.7, which can be rounded -0.5. This error of -0.2 can be explained by random error, which is compensated for by our uncertainties.

  1. Investigation into the relationship between acceleration and the angle of free fall downhill

    The distance travelled by the object was controlled at all times by putting a mark on the starting point, this way the object would never start over the starting point and would always cover the same distance. The initial velocity of the object was always kept at 0; a partner would make sure the object wasn?t moving before being released.

  2. Acceleration Lab. We believe that by using a ramp and a marble that we ...

    Marble 5. Meter Stick 6. Blocks Diagram Method 1. Set up the apparatus as shown in the diagram, using 5 blocks. 2. Mark 3 points on the ramp in equal segments ( 5 m apart , 10 m apart , etc.)

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work