Item NG016003: When a ball rolls downhill, the gravitational potential energy of the ball is transformed into motion energy.

A ball is rolling up and over a hill.  The ball slows down as it moves from Position 1 to Position 3, and it speeds up as it moves from Position 3 to Position 5.

When is the gravitational potential energy of the ball being transformed into motion energy (kinetic energy)?

  1. Only when the ball rolls from Position 1 to Position 3
  2. Only when the ball rolls from Position 3 to Position 5
  3. The entire time the ball is rolling from Position 1 to Position 5
  4. It is not being transformed at any time because gravitational potential energy cannot be transformed into motion energy (kinetic energy).

Distribution of Responses

Chart showing distrubtion of responses for Item NG016003

Percent of students responding correctly

Overall55%
Grades 6–853%
Grades 9–1258%
Male57%
Female54%
Primary Language is English56%
Primary Language is not English48%

View data table