## Item FM067003: Use of tables of speed versus time, and information about forces acting on an object, to determine the object's speed at various times.

An object is moving forward and no forces are acting on it. Every second, the object's speed is recorded. When the clock reads 0 seconds, the object's speed is 10 miles per hour (mi/hr). When the clock reads 2 seconds, a force begins to push the object forward. The force continues to act until the clock reads 4 seconds and then the force stops acting.

 Clock → 0 seconds 1 second 2 seconds 3 seconds 4 seconds 5 seconds 6 seconds Row A 10 mi/hr 9 mi/hr 8 mi/hr 8 mi/hr 8 mi/hr 7 mi/hr 6 mi/hr Row B 10 mi/hr 10 mi/hr 10 mi/hr 11 mi/hr 12 mi/hr 13 mi/hr 14 mi/hr Row C 10 mi/hr 10 mi/hr 10 mi/hr 11 mi/hr 12 mi/hr 12 mi/hr 12 mi/hr Row D 10 mi/hr 11 mi/hr 12 mi/hr 13 mi/hr 14 mi/hr 15 mi/hr 16 mi/hr

Which row of the table could be a correct representation of the object's speed between 0 seconds and 6 seconds? Assume that if a change in speed has occurred, the change is shown in the table.

1. Row A
2. Row B
3. Row C
4. Row D