24. What is the song about?
What things are
mentioned in the song?
25. Direction: Some machines are
so simple that we do not even
realize that they are machines.
Identify each simple machine
described below. The shapes of
the boxes have been provided to
guide you. Write the answers in
your drillboard.
26. • 1. Machine for opening cans
• 2. Machine for cutting paper
• 3. Machine used for moving sand from one
place to another
• 4. Machine used for pulling nails
• 5. Machine used for catching fish
27. SIMPLE MACHINE – is any
device that makes work
easier and faster by reducing
the effort or force used in
doing the work.
30. The Lever
a rigid bar that is free to turn about a
fixed point called the fulcrum
Every Lever has three (3) parts:
1. Resistance Force, Input Force or Load, What
you are trying to move or lift.
2. Effort Force or Output Force - The work done
on the Lever.
3. Fulcrum – A fixed pivot point.
33. • The Fulcrum (fixed pivot point) is located
between the Effort (Input) and the Resistance
(Output) Forces.
• The effort and the resistance move in
opposite directions.
• The effort force pushes down in order to lift
the resistance or load.
1st Class Lever
34.
35.
36.
37.
38.
39.
40.
41.
42.
43. The Pulley
• A pulley changes the direction of the force:
– Instead of lifting up, you can pull down using
your body weigh against the load (what is being
lifted)
• A pulley gains nothing in force, distance or
speed
51. • Functions of the screw
– To fasten things – the standard screw or nuts &
bolts.
– Drill bits are screws used to make holes.
– A jackscrew is used to lift heavy objects; car jack.
• When you turn a screw:
– The input force is changed by the threads into an
output force.
– The output force pulls the screw into the materials.
– Friction between the threads & the material holds
the screw in place.
52.
53.
54.
55. Pantomime Strips:
Orient the pupils about
pantomime. Have each group
pick a strip from the box. While a
representative is pantomiming
the rest of the groups should
guess the kinds of simple
machines and their uses. Every
correct answer of the group will
be given points
56. Plan It Out:
The pupils will identify all
the simple machines needed
to repair the house.
57. Group Activity
Group 1: Crossword Puzzle.
Identify the simple machine
being describe.
Group 2: Where do I belong?
Using the different pictures
classify what simple machine
they belong.
Group 3: What I am?
58.
59. EVALUATION:
1. Which of the following best
explains why lifting a heavy object
with a single fixed pulley and rope
makes the task seem easier?
a. Less force is needed to lift the
object
b. The direction of the force required
to lift the object is changed
c. Less work is done when moving
the object
d. The force needed to move the
object is applied over a greater
distance
60. 2. The three types of pulleys
systems are: Fixed, Movable
and .
a. Block and Attack
b. Tackle and Sing
c. Movable and Pull
d. Block and Tackle
61. 3. A stiff bar that moves
about a fixed point is a
a. lever
b. wheel and axle
c. wedge
d. inclined plane
62. 4. Which simple machine
would stairs be an example?
a. a wedge
b. a pulley
c. an inclined plane
d. a lever
63. 5. Which is an example of a
wheel and axle?
a. Hammer c. Ramp
b. Wagon d. Flag Pole
