Physics 141, Final Exam

December 19, 2007, 4.00 pm - 7.00 pm

 

Do not turn the pages of the exam until you are instructed to do so.

 

Exam rules: You may use only a writing instrument while taking this test.  You may not consult any calculators, computers, books, nor each other.

 

1.     Answer the multiple-choice questions (problems 1 – 10) by marking your answer on the scantron form.  For each multiple-choice question (problems 1 – 10), select only one answer.  Questions with more than one answer selected will be considered incorrect.  If your student ID is not listed properly on the Scantron form, the form will not be processed and you loose points for all multiple-choice questions.

2.     The analytical problems (11 – 18) must be answered in three blue exam booklets.  You must answer problems 11 and 12 in blue booklet # 1, problems 13, 14, and 15 in blue booklet # 2, and problems 16, 17, and 18 in blue booklet # 3.  If you do not follow this convention there is no guarantee that the problems that appear in the wrong booklet will be graded.

3.     The answer to each analytical problem must be well motivated and expressed in terms of the variables used in the problem.  You will receive partial credit where appropriate, but only when we can read your solution.  Answers that are not motivated will not receive any credit, even if correct.

4.     At the end of the exam, you must hand in the blue exam booklets, the scantron form, and the exam.  All items must be clearly labeled with your name and student ID number.  If any of these items is missing, we will not grade your exam, and you will receive a score of 0 points.

5.     You are not allowed to leave the exam room until 5.30 pm.

 

Name:  __________________________________________________

 

ID number:  ______________________________________________

 

Recitation Day/Time:  ______________________________________


Useful Relations:

 

 

 

 

 

 

 

 

 

 

 

 

 

Moments of inertia of various objects of uniform composition.

 

Problem 1 (2 points)

The diagram below shows a graph of the potential energy as function of the interatomic distance for a particular molecule.  Rank the magnitudes of the forces at locations A, B, and C.

 

 

1.     |FA| > |FB| > |FC|

2.     |FA| > |FC| > |FB|

3.     |FB| > |FA| > |FC|

4.     |FB| > |FC| > |FA|

5.     |FC| > |FA| > |FB|

6.     |FC| > |FB| > |FA|

 

Problem 2 (2 points)

An alph