Science Assessment ~ Topics ~ Force and Motion ~ Misconception FMM124

When a force acts on a moving object in the direction opposite the object’s direction of motion, the object will move at a constant speed for a while and then slow down (AAAS Project 2061, n.d.).

Items that test for misconception FMM124 in this project (Original Project) and key idea (If a force acts on an object in the…)
Item ID Number	Item Description	How Often the Misconception was Chosen
FM096001	A hockey puck that is sliding across the ice will move slower and slower the entire time it slides across the ice.	49%
FM097002	A snowmobile sliding across a lake with its engine turned off will move slower and slower the entire tme it is sliding across the lake.	31%
FM098002	A moving snowmobile will slow down the entire time that the force of the wind moving toward the snowmobile is greater than the force moving the snowmobile forward.	16%
FM069005	Use of tables of speed versus time, and information about forces acting on an object, to determine the object's speed at various times.	16%
FM055004	The speed of a sailboat will continue to decrease the entire time the force of the water slowing it down is greater than the force of the wind pushing it forward.	16%
FM095001	A moving object will slow down the entire time that a force that opposes its motion is greater than the force pushing or pulling it forward.	16%
FM103001	Use of tables of speed versus time, and information about forces acting on an object, to determine the object's speed at various times.	12%

Items that test for misconception FMM124 in this project (Original Project) and other key ideas
FM101001	If an object is moving forward, and a force pushing it backward is greater than a force pushing forward, the object will slow down, stop, and then begin to move faster and faster in the opposite direction.	18%