Item EG081002: Two objects that are moving at the same speed must have different masses in order to have different amounts of motion energy.

Two objects are moving at the same speed. The objects have different amounts of motion energy. Which of the following must be true?

  1. The objects are different sizes.
  2. The objects have different shapes.
  3. The objects have different masses.
  4. The objects are moving in different directions.
Distribution of Responses
Chart showing distrubtion of responses for Item EG081002
Students Responding Correctly
Group Correct Total Percent
Overall 803 1433 56%
Grades
  6–8 458 866 53%
  9–12 339 560 61%
Gender
  Male39070955%
  Female39769757%
Primary Language
  English712126556%
  Other7313853%

View data table