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

Percent of students responding correctly

Overall22%
Grades 6–819%
Grades 9–1226%
Male24%
Female21%
Primary Language is English23%
Primary Language is not English22%

View data table