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Created by: Faith Cohen/2009
A force is a push or
pull in a particular
Forces affect how objects
move. They may cause
motion: they may also slow,
stop or change the
direction of an object that
is already in motion.
They can make objects start
They can make objects
move faster.
They can make objects
move slower.
They can make objects
stop moving.
They can make objects
change direction.
They can make objects
change shape.
Since force causes changes
in the speed or direction of
an object we can say that
forces cause changes in
Forces cause acceleration.
Name the force in each picture as a push
or a pull. Then describe whether the force
is causing a change in speed or direction or
More than one force can
act upon an object at one
With multiple forces the
outcome depends on 2
•How strong the forces are
•The direction of the forces
When more than one force
acts on an object, the forces
combine to form a net force.
Forces may work together
or they may be opposite