Powerppint slide for My year 10 class in Malone college. We where making a bottle holder for our project. In this lesson we where discussing theory on Types of woods and how levers work.

2. By the end of this lessons everyone will:
 Know what manufactured boards are
 Applications for Manufactured boards
 Know what a turning effect is
 Know examples of a turning effect
 Know what a lever is
 Know the 3 different classes of levers
 Know examples of levers

3. What are
Manufactured
Boards???

4. Manufactured Boards (Man made wood)
1. MDF (medium density fibre board)
2. Chipboard
3. Hardboard
4. Plywood

5. What is MDF?
 MDF (medium density
fibre board) is made
from fibres of wood
mixed with glue.
 They are made by
heating the mixture and
squeezing it between
rollers and dried
between to metal
plates.
 It is easy to work with
and is used to make
furniture

6. What is Chipboard?
 Chipboard is
made from chips
of wood (wood
shavings).
 It is easy to
work with and is
used to make
kitchen units.

7. What is Hardboard?
 Hardboard is another
type which is made
from very fine wood
chips (a lot smaller
than the chips used to
make chipboard )
mixed with glue. It is
smooth on one face and
is rough on the other.
 Hardboard is used to
make the backs of
cupboards.

8. What is Plywood?
 Plywood is made by
gluing and
compressing wood
veneers tightly
together.
 A wood veneer is a thin
slice of wood that was
removed form a plank
of timber by a
specialised machine.
 Plywood is a very
strong piece of wood
and it is used for
flooring, wall partitions
and packaging boxes.

9. Now, turn to page
9 in your work
booklets and
complete
Worksheet 3

10.  It is when two forces are opposing each other
and the larger force overcomes the smaller
force causing it to turn.

11. Could you think of
any examples of a
turning effect?

12. 5N 12N

13.  Yes, the rope would pull to the right as the
adults have a greater force than the children
which are pulling to the left.

14.  Levers are one type of mechanism,
 some classes of levers can make the actions of an
applied force (called effort) easier to do
 with another class of levers the effort is harder to do

16.  Tweezers
 A wheel barrow
 A see saw
 A fishing rod
 A nutcracker
 A pair of scissors
 Using a spade
 Using a crowbar

17.  Both class 1 and 2 levers are when the effort
is smaller than the load. Examples are below:
Class 1 lever Class 2 lever

18.  A class 3 lever is different than the previous
two, as it requires a bigger effort than the
load. Examples are shown below.

21. Fretsaw Coping Saw Templates
Bench Vice Sand Paper Pillar drill

22. Wood can be joined together in many ways. Some are very
simple to do but are weak e.g. the Butt Joint (shown below).