AP Physics 1 Question 33: Answer and Explanation

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Question: 33


In the graph above, the instantaneous velocity at 9 seconds is closest to

  • A. m/s
  • B. - m/s
  • C. m/s
  • D. - m/s

Correct Answer: D


D The slope of the tangent line gives the instantaneous velocity. You could also use Process of Elimination. Recognize the answer must be negative, so you can eliminate (A) and (C). The point in question is (9, 4). Dividing the y-coordinate by the x-coordinate is not the same as the obtaining the slope and is there to distract you.