A2L Item 168

Goal: Interpreting graphs

Source: CT151.2-5

object’s motion is described by the graph above. The average
acceleration during the first 10 s is most nearly…

  1. 0 m/s2
  2. 20 m/s2
  3. 30 m/s2
  4. 40 m/s2
  5. 50 m/s2
  6. Other



(3) Students may have difficulty understanding what they are
asked. Recasting the problem in terms of areas helps. The only
contenders should be #2 or #3. Counting blocks should make it clear that
the result is much closer to #3.