The motion of an object can
be described by its position, direction of motion, and speed. That motion
can be measured and represented on a graph.
- An object that is not being subjected to a force will continue to
move at a constant speed and in a straight line.
- If more than one force acts on an object along a straight line, then
the forces will reinforce or cancel one another, depending on their
direction and magnitude. Unbalanced forces will cause changes in the
speed or direction of an object's motion.