Item EG079001: When comparing two runners with different amounts of motion energy, the only way to know which one weighs more is to also know how fast each is running.

Two students are running in a race. Student 1 has more motion energy (kinetic energy) than Student 2. Does Student 1 weigh more than, less than, or the same as Student 2?

  1. Student 1 weighs more than Student 2.
  2. Student 1 weighs less than Student 2.
  3. Student 1 weighs the same as Student 2.
  4. The only way to know which student weighs more is to also know how fast each student is running.

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