Item FM075004: The length and direction of force arrows on an object can be used to determine the total force on the object.

In the drawing below, the arrows labeled Force 1 and Force 2 represent two forces acting on an object. The directions of the arrows show the directions of the forces, and the lengths of the arrows represent the strengths of the forces. Which answer choice shows an object being acted upon by forces that do NOT add up to zero?

Distribution of Responses
Chart showing distrubtion of responses for Item FM075004
Students Responding Correctly
Group Correct Total Percent
Overall 900 1799 50%
  6–8 504 1128 45%
  9–12 390 662 59%
Primary Language

View data table

NRC Framework
MS PS2.A Each force acts on one particular object and has both a strength and a direction.
NGSS addresses the idea of multiple forces acting on an object but not how to interpret force arrow diagrams of those forces.