PHY 121
Your 'cq_1_01.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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The problem:
Here is the definition of rate of change of one quantity with respect to another:
The average rate of change of A with respect to B on an interval is
• average rate of change of A with respect to B = (change in A) / (change in B)
Apply the above definition of average rate of change of A with respect to B to each of the following. Be sure to identify the quantity A, the quantity B and the requested average rate.
• If the position of a ball rolling along a track changes from 10 cm to 20 cm while the clock time changes from 4 seconds to 9 seconds, what is the average rate of change of its position with respect to clock time during this interval?
(20-10)/(9-4)=10/5=2cm/second
answer/question/discussion:
• If the velocity of a ball rolling along a track changes from 10 cm / second to 40 cm / second during an interval during which the clock time changes by 3 seconds, then what is the average rate of change of its velocity with respect to clock time during this interval?
(40-10)/3=30/3=10cm/second
answer/question/discussion:
• If the average rate at which position changes with respect to clock time is 5 cm / second, and if the clock time changes by 10 seconds, by how much does the position change?
Change in A/10 seconds=5cm/second
(Change in A/10 sec)*(10 sec) =(5cm/second)*(10 sec)
Change in A=50 cm.
answer/question/discussion:
• You will be expected hereafter to know and apply, in a variety of contexts, the definition given in this question. You need to know this definition word for word. If you try to apply the definition without using all the words it is going to cost you time and it will very likely diminish your performance. Briefly explain how you will ensure that you remember this definition.
Because I understand this concept, I feel that I will not have trouble remembering this definition. I do, however, keep notecards with important definitions and formulas, and I will add this to my notecards.
answer/question/discussion:
• You are asked in this exercise to apply the definition, and given a general procedure for doing so. Briefly outline the procedure for applying this definition, and briefly explain how you will remember to apply this procedure.
This definition will be applied when I am given a change in time and a change in rate, or one of these quantities and the average rate of change. I can determine the changes if I am given an initial rate and final rate, or initial position and final position.
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15minutes...but I did not have uninterrupted time today!
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&#Your work looks very good. Let me know if you have any questions. &#