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Item EG025001: In order to know which of two objects is moving faster, you need to know the weight (mass) of each object in addition to the motion energy.

The motion energy (kinetic energy) of Object 1 is greater than the motion energy of Object 2. Is Object 1 moving faster, slower, or at the same speed as Object 2?

  1. Object 1 is moving faster than Object 2.
  2. Object 1 is moving slower than Object 2.
  3. Object 1 is moving at the same speed as Object 2.
  4. The only way to know which object is moving faster is to also know the weight (mass) of each object.
Distribution of Responses
Chart showing distrubtion of responses for Item EG025001
Students Responding Correctly
Group Correct Total Percent
Overall 727 3270 22%
  6–8 367 1902 19%
  9–12 357 1358 26%
Primary Language

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