Balanced and
Unbalanced Force
•http://www.youtube.com/watch?v=DWCor34PzAw
What is a force?
• A force is a push or pull that causes an object to move,
stop, or change direction
• In physics a force is anything that makes an object
accelerate
Force and Net Force
• Net force is the total force
on an object.
Balanced and Unbalanced Forces
• Forces occur in pairs and they can be either
balanced or unbalanced
Unbalanced Force
Balanced Force
• Unbalanced Force
can cause an
object to move,
stop moving, or
change direction.
• The balanced
forces are the
forces in equal
and opposite
directions.
Balanced Forces
• Balanced forces do not cause change in motion
• They are equal in size and opposite in direction
• If your calculations result in zero, then its
balanced.
Unbalanced Forces
• An unbalanced force always causes a change in
motion
• When unbalanced forces act in opposite directions
you can find the net force
– Net force
• Magnitude
– The difference between the two forces
• Direction
– Direction of the largest force
Unbalanced Forces
•3 N, right – 6 N, left = 3N, left
Unbalanced Forces
•4 N, left – 10 N, right = •6N, right
Unbalanced Forces
•5 N, right + 10 N, right = •15N, right
• HMM….
Can you
see the
unbalanced
force here?
Phet Simulation
• http://phet.colorado.edu/en/simulation/force
s-and-motion-basics
Force Worksheet
• Complete force worksheet with your
partner.
Exit Ticket
• On a sheet of paper answer the following
question:
• Calculate the force
• And share the direction
• Of the force.