Item EG081001: 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 made of different materials.

Distribution of Responses

Chart showing distrubtion of responses for Item EG081001

Percent of students responding correctly

Overall56%
Grades 6–854%
Grades 9–1260%
Male57%
Female57%
Primary Language is English58%
Primary Language is not English44%

View data table