The motion will follow the path of
the stronger force on the object.
Below is a top-view diagram of a box sitting on a floor. Students
are asked to describe the path/motion of the box, assuming that the
forces remain constant.
Students suffering from this misconception will state that the
box travels in a straight line to the right, ignoring the smaller 10
N force acting on the box.
Related misconceptions/student difficulties that may arise in
with a constant net force will have a constant speed.
A constant force
accelerates a body, until the body uses up all the power of the
The net force must
be in the direction of motion, so objects will travel along a
line in that direction.
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Brown and Jeff
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