2004 AP Physics B & Physics C Released Exam

Chapter III: Answers to the 2004 AP Physics B Exam ■

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Section I: Multiple Choice ■ Section I Answer Key and Percent Answering Correctly ■ Analyzing Your Students’ Performance on the Multiple-Choice Section ■ Diagnostic Guide for the 2004 AP Physics B Exam Section II: Free Response ■ Comments from the Chief Reader ■ Scoring Guidelines, Sample Student Responses, and Commentary ■ Question 1 ■ Question 2 ■ Question 3

■ ■ ■

Question 4 Question 5 Question 6

Section I: Multiple Choice Listed below are the correct answers to the multiple-choice questions, the percent of AP students who answered each question correctly by AP grade, and the total percent answering correctly.

Section I Answer Key and Percent Answering Correctly Item

Correct

Percent Correct by Grade

No.

Answer

5

4

3

2

1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

E B E E B A E E C B D C A C A A B E D D E D C B B A C E A C E B B A D

94 81 58 83 98 97 63 84 96 92 73 67 61 70 58 71 58 64 91 54 85 56 94 94 87 67 80 91 97 46 95 91 72 70 54

88 63 45 65 92 88 46 70 90 75 65 48 41 57 43 51 33 32 74 23 70 44 88 83 75 50 59 80 96 24 92 87 62 38 25

78 44 37 45 80 73 33 59 83 51 56 37 29 50 31 36 18 16 52 10 58 41 83 71 63 38 37 64 93 16 90 84 58 18 14

67 29 31 29 63 56 27 50 73 30 49 28 22 45 21 26 11 8 36 7 51 40 78 56 49 28 22 46 89 11 85 75 49 9 10

50 21 27 15 35 32 18 44 51 18 34 23 17 38 11 18 11 6 18 8 40 38 70 38 32 19 13 27 77 11 72 52 34 7 11

Total Percent Correct 72 43 37 42 69 64 34 58 75 47 52 37 30 49 29 36 22 20 48 16 57 42 81 64 57 37 36 56 89 18 85 75 52 23 19

Item

Correct

Percent Correct by Grade

No.

Answer

5

4

3

2

1

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

C E A E B A B E E D D C D A E A A E E D D A E E C C B D D D D C E C A

59 71 66 46 87 94 79 72 85 51 43 57 90 91 57 55 75 26 85 31 55 78 57 71 26 87 58 29 66 33 72 74 69 60 33

40 56 49 19 75 90 55 47 74 45 21 36 76 82 35 31 53 12 72 22 33 61 35 50 8 78 39 8 58 16 59 48 50 33 16

27 45 37 8 63 78 36 26 61 46 15 25 57 70 22 19 33 7 56 14 20 44 22 35 6 72 23 3 49 10 44 28 40 23 10

19 37 27 4 48 59 27 15 50 46 13 19 39 59 17 14 20 6 39 9 12 30 14 23 7 66 15 2 41 6 32 16 34 18 7

13 28 20 4 28 29 24 10 32 42 14 16 23 37 15 13 10 5 19 9 10 15 10 15 10 53 10 4 31 8 17 13 26 19 9

Total Percent Correct 28 44 36 12 56 65 39 29 56 45 18 27 52 64 25 23 32 9 49 15 22 41 23 34 10 69 25 7 46 13 40 30 40 27 13

51

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15956-18113 • AP Physics B and Physics C Released Exam • Minion, Serifa, Zaph Dingbats • creation/MS Dev 10/29–11/4/04 las • InDesign conv & revs 12/08/04 jep

Analyzing Your Students’ Performance on the Multiple-Choice Section 3. Compare the student’s number of correct answers for each section with the average number correct for that section.

If you give your students the 2004 exam for practice, you may want to analyze their results to find overall strengths and weaknesses in their understanding of AP Physics B. The following diagnostic worksheet will help you do this; feel free to photocopy it and distribute it to your students for completion.

In addition, under each item, the percent of AP students who answered correctly is shown, so students can analyze their performance on individual items. This information will be helpful in deciding how students should plan their study time.

1. In each section, students should insert a check mark for each correct answer. 2. Add together the total number of correct answers for each section.

Diagnostic Guide for the 2004 AP Physics B Exam Mechanics (Average number correct: 13.3 out of 26) Question #

1

2

3

4

5

6

7

8

9

10

11

29

30

Percent of Students Answering Correctly

72

43

37

42

69

64

34

58

75

47

52

89

18

Question #

31

32

33

40

41

42

43

44

61

62

63

67

68

85

75

52

56

65

39

29

36

69

25

7

30

40

Correct/Incorrect

Correct/Incorrect Percent of Students Answering Correctly

Electricity and Magnetism (Average number correct: 6.2 out of 18) Question #

14

15

16

17

18

19

20

21

45

46

47

48

49

64

65

66

69

70

49

29

36

22

20

48

16

57

45

18

27

52

64

46

13

40

27

13

Correct/Incorrect Percent of Students Answering Correctly

52

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15956-18113 • AP Physics B and Physics C Released Exam • Minion, Serifa, Zaph Dingbats • creation/MS Dev 10/29–11/4/04 las • InDesign conv & revs 12/08/04 jep

Diagnostic Guide for the 2004 AP Physics B Exam (continued) Fluids and Thermal Physics (Average number correct: 3.4 out of 9) Question #

12

13

22

23

37

38

39

56

57

37

30

42

81

44

36

12

22

41

Correct/Incorrect Percent of Students Answering Correctly

Waves and Optics, Atomic and Nuclear Physics (Average number correct: 5.4 out of 17) Question #

24

25

26

27

28

34

35

36

50

51

52

53

54

55

58

59

60

64

57

37

36

56

23

19

28

25

23

32

9

49

15

23

34

10

Correct/Incorrect Percent of Students Answering Correctly

Number Correct

Number of Questions Average Number Correct

Mechanics

Electricity and Magnetism

Fluids and Thermal Physics

Waves and Optics, Atomic and Nuclear Physics

26

18

9

17

13.3 (51.2%)

6.2 (34.4%)

3.4 (37.8%)

5.4 (31.8%)

My Number Correct

53

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15956-18113 • AP Physics B and Physics C Released Exam • Minion, Serifa, Zaph Dingbats • creation/MS Dev 10/29–11/4/04 las • InDesign conv & revs 12/08/04 jep