A single force, called force, can be used to replace a of forces that act on a body. If the resultant force is then the body will either remain at or continue to move at
a constant .
If the resultant force is in the same as an object’s motion, the object will . A car is
decelerated when the braking force acts in the direction to the car’s motion.
Forces always occur in . If a force is exerted on an there will always be another force,
same in size, acting in the opposite direction.