What is a force?
A force a push or a pull.
is
It is an action that can
change the shape size
and motion, of an object.
The following examples show the different effects
of forces.
An arrow hits into a target.
(The arrow pushes into the
target)
An athlete reaches the finishing line
and the finishing line is being
stretched.
(The athlete pushes the finishing line
and the finishing line is being pulled)
A basketball goes through through the
net.
(The basketball pushes through the net)
Is it a push or a pull?
Action
Dragging
Poking
Pressing
Squeezing
Stepping
Stretching
Tugging
Wringing
Is it a push or a pull?
Pull
Push
Push
Push
Push
Pull
Pull
Push/pull
What is this woman doing?
Well done!
She is pulling the handle to lift up the weight.
What will happen when you step on the
step-pad ?
Yes. The lid will open.
Are you pushing or pulling the steppad?
Well done! You are pushing the steppad.
What is the man trying to
do?
Yes. He is trying to drill a hole.
Is the drill bit pushing or pulling itself into the wood?
Well done! The drill bit is pushing itself into
the wood.
What happens when a force is
applied?
The stationary
object moves
What happens when a force is
applied?
The speed of
the object
increases
What happens when a force is
applied?
The object
changes
direction
What happens when a force is
applied?
The moving
object stops
moving.
What happens when a force is
applied?
The shape of
the object
changes.
Effects of forces
1. Force can move a stationary object.
2. Force can change the speed of a
moving object.
3. Force can stop a moving object.
Effects of forces
4. Force can change direction of a
moving object.
4. Force can change the shape of an
object.