7. (2) Pulley
- It is a kind of lever that uses a wheel & a
rope to lift an object
Examples:
When you pull down one end of the rope, the
other end rises up
Wheel
Rope
8. (3) Wheel & Axle
- It is a kind of lever that uses a wheel that
moves around an axle.
Examples:
A Ferris wheel
Wheel
Axle
11. It is a simple machine with flat & inclined
surface which reduce the force needed to
move an object.
Example:
A Ramp
- It is easier to slide a heavy box on an inclined
Plane than to lift it up.
(4) Inclined plane
12. - It is an inclined plane wrapped onto a spiral.
- "A screw changes a turning force into a
downward force“ as we turn the screw,
it moves down.
Example:
{It is easier to turn a screw than to pound a nail}
(5) A screw
14. It is a simple machine that splits objects
apart.
"A Wedge changes a downwards force into
sideways force"
Examples:
The Head of an Ax The Knife
(6) A Wedge
15. They are made of two or
more simple machines
together.
Compound machines