2. FORCES
FORCES
Forces transmit energy,
which is the
ability to produce change.
Energy can deform an object and cause it to
change its motion
FORCES DEFORM OBJECTS
if we apply a force to an elastic on defomable object ,we change its
shape .When stop appling the force:
-an elastic object returs to its previous shape . This property is elasticity
-a deformable object maintains its new shape.This property is know as
plasticity
3. FORCES MOVE OBJECTS
Force changes the
speed of an object:
it can increase it or
decrease it. It can also
change the object's
line of action.
4. wheelbarrow
Machines are devices invented by human to make
work easier. Some machines uses mechanical energy
to transmit force,others use different kinds of energy.
MACHINES
see saw balance scale
5. File Edit Format View
B I U
Robots
Robots are computer-controlled machines
designed to carry out jobs that are
repetitive, difficult or dangerous for
humans.
6. ELECTICAL CIRCUIT
An electrical circuit is a
group of interconnected
elements that allows us
to generate, distribute
and utilise electric
current.
7. Magnets are objects made from materials that have
property to attract iron and some other metal.
This property is called magnetism . We can find natural
magnets and artificial magnets.
The magnetic properties of a magnet are strongest
at poles (north pole and south pole):
-when two different poles come together ,the magnets
attract each other
-when two poles (same poles )come together, the magnets
repel each other.
Magnetism
