AP Physics 1 Question 329: Answer and Explanation
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7. Question below refers to the following figure:
Rank the change in momentum for each segment from least (most negative) to greatest (most positive). Assume that the mass of the object remains constant.
- A. BC, EF, DE, AB, CD
- B. AB, CD, DE, EF, BC
- C. BC, EF, DE, CD, AB
- D. CD, DE, EF, BC, AB
Correct Answer: D
Mass is not changing, so you need to consider only the changes in velocity. For each segment in order, the change in velocity is +7 m/s, 0 m/s, -4 m/s, -3 m/s, and -2 m/s. The question does not specify magnitude only, so all negatives will come before the others.