course PHY201 çêwÅ¿ÃáWÒƒ¥¼w™Ú_™½¾æˆµv{½þassignment #000
......!!!!!!!!...................................
22:43:27 The Query program normally asks you questions about assigned problems and class notes, in question-answer-self-critique format. Since Assignments 0 and 1 consist mostly of lab-related activities, most of the questions on these queries will be related to your labs and will be in open-ended in form, without given solutions, and will not require self-critique. The purpose of this Query is to gauge your understanding of some basic ideas about motion and timing, and some procedures to be used throughout the course in analyzing our observations. Answer these questions to the best of your ability. If you encounter difficulties, the instructor's response to this first Query will be designed to help you clarify anything you don't understand. {}{}Respond by stating the purpose of this first Query, as you currently understand it.
......!!!!!!!!...................................
RESPONSE --> The purpose of this assignment is to test my knowledge on the basic concepts of motion and timing.
.................................................
......!!!!!!!!...................................
22:49:20 If, as in the object-down-an-incline experiment, you know the distance an object rolls down an incline and the time required, explain how you will use this information to find the object 's average speed on the incline.
......!!!!!!!!...................................
RESPONSE --> To find the average speed of an object you will need to divide the time traveled by the time it took to complete the evolution. confidence assessment: 3
.................................................
......!!!!!!!!...................................
22:54:42 If an object travels 40 centimeters down an incline in 5 seconds then what is its average velocity on the incline? Explain how your answer is connected to your experience.
......!!!!!!!!...................................
RESPONSE --> If an object travels 40 centimeters down an incline in 5 seconds then the average velocity is the result of 40cm divided by 5s. .4m / 5s = .08 m/s confidence assessment: 3
.................................................
......!!!!!!!!...................................
22:59:51 If the same object requires 3 second to reach the halfway point, what is its average velocity on the first half of the incline and what is its average velocity on the second half?
......!!!!!!!!...................................
RESPONSE --> If the same object requires 3 second to reach the halfway point, then the velocity is the result of half the total distance divided by 3s. 40cm / 2 = 20cm .2m / 3s = 6cm/s To find the avg velocity on the second half we divide half the total distance by the difference of the two time intervals. 40cm / 2 = 20cm 5s - 3s = 2s .2m / 2s = 10cm/s confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:04:15 Using the same type of setup you used for the first object-down-an-incline lab, if the computer timer indicates that on five trials the times of an object down an incline are 2.42 sec, 2.56 sec, 2.38 sec, 2.47 sec and 2.31 sec, then to what extent do you think the discrepancies could be explained by each of thefollowing: {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse){}{}c. Actual differences in the time required for the object to travel the same distance.{}{}d. Differences in positioningthe object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> Using the same type of setup you used for the first object-down-an-incline lab, if the computer timer indicates that on five trials the times of an object down an incline are 2.42 sec, 2.56 sec, 2.38 sec, 2.47 sec and 2.31 sec, then to what extent do you think the discrepancies could be explained by each of thefollowing: a. The lack of precision of the TIMER program This is not likely b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse). This is a highly probable conclusion c. Actual differences in the time required for the object to travel the same distance. This is possible, considering friction, air resistance, etc. d. Differences in positioningthe object prior to release. This is possible, but if the starting point was properly marked then there should not have been much of a variance. e. Human uncertainty in observing exactly when the object reached the end of the incline. This is highly probable confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:06:38 How much uncertainty do you think each of the following would actually contribute to the uncertainty in timing a number of trials for the object-down-an-incline lab? {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated bLine$(lineCount) =with an actual human finger on a computer mouse){}{}c. Actual differences in the time required for the object to travel the same distance.{}{}d. Differences in positioning the object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> How much uncertainty do you think each of the following would actually contribute to the uncertainty in timing a number of trials for the object-down-an-incline lab? On a scale of 1 to 10.. a. The lack of precision of the TIMER program 3 b. The uncertain precision of human triggering (uncertainty associated bLine$(lineCount) =with an actual human finger on a computer mouse) 9 c. Actual differences in the time required for the object to travel the same distance. 5 d. Differences in positioning the object prior to release. 3 e. Human uncertainty in observing exactly when the object reached the end of the incline. 9 confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:11:17 What, if anything, could you do about the uncertainty due to each of the following? Address each specifically. {}{}a. The lack of precision of the TIMER program{}{}b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse){}{}c. Actualdifferences in the time required for the object to travel the same distance.{}{}d. Differences in positioning the object prior to release.{}{}e. Human uncertainty in observing exactly when the object reached the end of the incline.
......!!!!!!!!...................................
RESPONSE --> What, if anything, could you do about the uncertainty due to each of the following? Address each specifically. a. The lack of precision of the TIMER program. Nothing that you could do. b. The uncertain precision of human triggering (uncertainty associated with an actual human finger on a computer mouse). The only way to minimize error, would be to practice by making several trial runs. c. Actual differences in the time required for the object to travel the same distance. Conduct testing a stable enviroment. d. Differences in positioning the object prior to release. Mark off your starting point and set a point of reference on the ball (such as center of ball) on which you will repeat with each observation. e. Human uncertainty in observing exactly when the object reached the end of the incline. Focus solely on your observation and eliminate all surrounding distractions. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:13:56 According to the results of your introductory pendulum experiment, do you think doubling the length of the pendulum will result in half the frequency (frequency can be thought of as the number of cycles per minute), more than half or less than half?
......!!!!!!!!...................................
RESPONSE --> Doubling the length of the pendulum would halve the frequency of taps against the bracket. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:18:58 Note that for a graph of y vs. x, a point on the x axis has y coordinate zero and a point on the y axis has x coordinate zero. In your own words explain why this is so.
......!!!!!!!!...................................
RESPONSE --> In a x vs. y graph, the x axis has y coordinate zero, because the x-axis is the reference from which y will reference a pos or neg measurement. The y axis has y coordinate zero, because it is the reference from which x will reference a pos or neg measurement. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:24:31 On a graph of frequency vs. pendulum length (where frequency is on the vertical axis and length on the horizontal), what would it mean for the graph to intersect the vertical axis (i.e., what would it mean, in terms of the pendulum and its behavior, if the line or curve representing frequency vs. length goes through the vertical axis)? What would this tell you about the length and frequency of the pendulum?
......!!!!!!!!...................................
RESPONSE --> If the graph of a frequency vs. pendulum length, where the graph intersects the vertical plane would mean that it is out of phase. This would tell you that they are indirectly proportional. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:28:54 On a graph of frequency vs. pendulum length, what would it mean for the graph to intersect the horizontal axis (i.e., what would it mean, in terms of the pendulum and its behavior, if the line or curve representing frequency vs. length goes through the horizontal axis)? What would this tell you about the length and frequency of the pendulum?
......!!!!!!!!...................................
RESPONSE --> On a graph of frequency vs. pendulum length, where the graph intersects the horizontal line, it would mean that it is in phase and the two were directly proportional. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:32:45 If a ball rolls down between two points with an average velocity of 6 cm / sec, and if it takes 5 sec between the points, then how far apart are the points?
......!!!!!!!!...................................
RESPONSE --> If it takes a ball 5s to roll between 2 points at a rate of 6cm/s, then multiply the rate of speed by the elapsed time. 6cm/s * 5s = 30cm confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:33:10 On the average the ball moves 6 centimeters every second, so in 5 seconds it will move 30 cm. {}{}The formal calculation goes like this: {}{}We know that vAve = `ds / `dt, where vAve is ave velocity, `ds is displacement and `dt is the time interval. {}It follows by algebraic rearrangement that `ds = vAve * `dt.{}We are told that vAve = 6 cm / sec and `dt = 5 sec. It therefore follows that{}{}`ds = 6 cm / sec * 5 sec = 30 (cm / sec) * sec = 30 cm.{}{}The details of the algebraic rearrangement are asfollows:{}{}vAve = `ds / `dt. We multiply both sides of the equation by `dt:{}vAve * `dt = `ds / `dt * `dt. We simplify to obtain{}vAve * `dt = `ds, which we then write as{}`ds = vAve *`dt.{}{}Be sure to address anything you do not fully understand in your self-critique.
......!!!!!!!!...................................
RESPONSE --> okay self critique assessment: 3
.................................................
......!!!!!!!!...................................
23:38:47 You were asked to read the text and some of the problems at the end of the section. Tell me about something in the text you understood up to a point but didn't understand fully. Explain what you did understand, and ask the best question you can about what you didn't understand.
......!!!!!!!!...................................
RESPONSE --> In the first chapter of the book, there is not anything that I did not understand. This is all stuff that I have seen before and usually see on an almost daily basis. The only thing that I can think of is that I need to work on fully reading and comprehending the questions being asked. i have completely screwed up some of these questions, just on my own fault. confidence assessment: 3
.................................................
......!!!!!!!!...................................
23:40:29 Tell me about something in the problems you understand up to a point but don't fully understand. Explain what you did understand, and ask the best question you can about what you didn't understand.
......!!!!!!!!...................................
RESPONSE --> The problem that I had an issue with was the grph problem. I think I need a picture of the graph or maybe I just did not read the question right. confidence assessment: 3
.................................................
"