An object is moving forward.  Then a force begins to push on the object from behind.

What will happen to the object's motion while this force acts?  You can assume that the force of friction is so small that it will not affect the object’s motion and that there are no other forces acting on the object.

A.  The object's speed will increase the entire time the force acts.

B.  The object’s speed will stay the same the entire time the force acts.

C.  The object’s speed will increase for a while and then stay the same.

D.  The object’s speed will stay the same for a while and then increase.

Distribution of Responses

Chart showing distrubtion of responses for Item FM036003

Percent of students responding correctly

Overall41%
Grades 6–842%
Grades 9–1241%
Male43%
Female40%
Primary Language is English42%
Primary Language is not English38%

View data table