#$&*
course PHY 231
Please find attache Lab 1.
Copy this document, from this point to the end, into a word processor or text editor. • Follow the instructions, fill in your data and the results of your analysis in the given format.
• Regularly save your document to your computer as you work.
• When you have completed your work:
Copy the document into a text editor (e.g., Notepad; but NOT into a word processor or html editor, e.g., NOT into Word or FrontPage). Highlight the contents of the text editor, and copy and paste those contents into the indicated box at the end of this form. Click the Submit button and save your form confirmation.
Initial Timing Experiment
The platform was the textbook Fundamentals of Building Construction with ISBN 9780471183495. The rolling object used was a standard size marble.
The textbook was supported above the horizontal about 0.6 cm by four .25 cents coins.
Initially the object rolled down smoothly, with just a small turning towards the end. The speed of the object increased as this moved down the textbook.
#$&* (note that your answer should always start in one of the blank lines preceding the #$&* mark)
In the space indicated below report your data. State exactly what was measured, how it was measured, how accurately you believe it was measured and of course what the measurements were. Try to organize your report so the reader can easily scan your data and identify any patterns or trends.
your brief discussion/description/explanation:
Data was recorded using a timer on a computer. The experiment consist of measuring how long it took a marble to roll down a 28.4 cm textbook elevated 0.6 cm above the horizontal by four .25 cents coins.
Data was recorded using a timer on a computer, observing the time at which the marble was released from the top edge of the textbook platform and then observing the time at which the marble left the edge of the textbook platform. The data collected is fairly accurate; however, the human error is still present.
From the top edge of the platform:
1 1.66196 seconds
2 1.69225 seconds
3 1.70230 seconds
From 180 degrees rotation:
1 2.01246 seconds
2 1.80020 seconds
3 1.70934 seconds
#$&*
Using your data determine how fast the object was moving, on the average, as it rolled down the incline. Estimate how accurately you believe you were able to determine the object's average speed, and give the best reasons you can for your estimate of the accuracy.
your brief discussion/description/explanation:
From the top edge of the platform:
1 16.70 cm/s
2 15.19 cm/s
3 17.01 cm/s
From 180 degrees rotation:
1 12.99 cm/s
2 14.87 cm/s
3 15.90 cm/s
Even when the information collected represents a fair calculation, the accuracy of the data vary in all cases by at least a 10th of a cm, indicating the presence of the human error.
#$&*
How fast was the object moving at the beginning of the timed interval?
According to your previous calculation, what was its average speed during this interval?
Do you think the object, when it reached the lower end of the book, was moving at a speed greater or less than the average speed you calculated?
Your brief discussion/description/explanation:
With an initial velocity = 0, the object was moving slow during the first seconds of its displacement, averaging about 13.98 cm/s. However, during the down incline displacement its velocity increased to be more than its average speed.
#$&*
List the following in order, from least to greatest. Indicate 'ties': The object's initial speed, its final speed, its average speed, and the change in its speed as it rolled from one end of the book to the other.
Your brief discussion/description/explanation:
Initial speed, average speed, change of its speed as it rolled from the top edge of the textbook to the bottom edge of the textbook, then its final speed.
#$&*
Devise and conduct an experiment to determine whether or not the object is speeding up as it rolls down the incline. If you have set the experiment up as indicated, it should seem pretty obvious that the object is in fact speeding up. But figure out a way to use actual measurements to support your belief.
Explain how you designed and conducted your experiment, give your data and explain how your data support your conclusions.
Your brief discussion/description/explanation:
Placing a measuring tool like a ruler on the textbook and along the full length of the platform would help to record at specific time intervals how far the object had gone. This data collected would show how far the object has traveled per time interval and with that information collect data to support the idea that the object would be increasing its speed as it moves farther down in distance.
#$&*
Your instructor is trying to gauge the typical time spent by students on these experiments. Please answer the following question as accurately as you can, understanding that your answer will be used only for the stated purpose and has no bearing on your grades:
Approximately how long did it take you to complete this experiment?
69 minutes.
"
&#This looks good. Let me know if you have any questions. &#