This document discusses different types of simple machines: levers, pulleys, and inclined planes. It provides examples of each type and how they work. Lever types include class 1, 2, and 3 levers and their examples. Pulleys are divided into fixed, movable, and compound pulley systems. The mechanical advantage of each system is defined based on the distances and forces involved. Inclined planes use the equation Force x Distance = Weight x Height to calculate mechanical advantage. Examples of calculating unknown forces are provided for each simple machine.
3. What is the use of bicycles for humans?
• Bicycles can be used to facilitate human
work, because on the bicycle wheel there
is a large gear & a small gear that can
produce a style on the bicycle wheel
• Gir (gears) include
simple aircraft because
it facilitates human
work.
• What is a simple plane?
5. Simple aircraft among others
lever
Inclined plane
pulley
Simple plane is any tool that
allows human to do work
(effort).
Called simple because the
equipment is designed (made)
in a simple form.
Simple
plane
SIMPLE PLANE
6. Working system lever there are 3 parts, namely:
1. The fulcrum (T) is the pedestal for the lever.
2. The load point (W) is where to place or place the load to be lifted
or moved
3. The power point (F) is the point at which the force force is given
Lw = distance between the fulcrum and the load point
Lf = distance between fulcrum and force point
Lw = distance between
the fulcrum and the
load point
Lf = distance between
fulcrum and force
1. Lever
7. BASED ON THE WORKING SYSTEM,
THE LEVER CONSISTS OF 3, NAMELY:
That is the lever whose fulcrum (T) lies between the load point
(W) and the power point (F).
The longer the arm
of the power, the
less force it takes to
bring up the load.
examples of lever tools of type I
are:
A. Type
I
8. is the lever whose load (W) is located
between the pivot (T) and the power
point (F)
• Examples of type II lever tools are:
B. Type II
13. EXERCISE
The iron weighs 160 N is lifted with a long lever arm 2.5m
and its load arms 1 m.
Dik. W = 160 N
Lw = 1 m
LF = 2.5 m
Dit. F =?
Km =?
Answer. W x Lw = F x LF Km = W / F = 160/64
160 x 1 = F x 2.5 Km = 2.5
F = 64
14. PULLEY
It is a small wheel whose edges are grooved and can
rotate on a shaft.
Pulleys are divided into 3:
15. A. PULLEY PERMANENT IS PULLEY THAT PLACEMENT
PERMANENT IN A THE PLACE
INFORMATION :
A = POINT POWER OA = ARM POWER
B = POINT LOAD OB = ARM LOAD
O = POINT FULCRUM
F = POWER ON PULLEY THETAP
W = LOAD OA = OB
THEN BIG PROFIT MEKANIKNYA IS 1
KM = W / F = LF / LW = 1
16. EXAMPLE QUESTION
LOGAMN THAT DISPLACEMENT 250 N BE
APPOINTED WITH PULLEY PERMANENT,
COMPUTE BIG POWER!
DIK, W = 250
DIT, F =?
ANSWER = W / F = 1
250 / F = 1
F = 250/1
F = 250 N
17. B. PULLEY MOVE
THAT IS THAT PLACEMENT NO PERMANENT, SO THAT BE
USED PULLEY COULD MOVE WITH FREE,
KET: "
A = POINT LOAD OA = ARM LOAD
B = POINT POWER OB = ARM POWER
O = POINT TUMNPU ON PULLEY MOVE, OB = 2 X OA
F = POWER LF = 2 X LW
W = LOAD
THEN BIG PROFIT MEKANIKNYA IS 2
KM = W / F = LF / LW = 2
18. EXAMPLE QUESTION
A LOAD THAT BE IN SOMETHING THE PLACE WITH MASS
800 G AND ACCELERATION GRAVITATION HIS 10 M / S².
COMPUTE POWER THAT BE GIVEN IF LOAD MENTIONED BE
APPOINTED WITH PULLEY PERMANENT AND PULLEY MOVE,
DIK, M = 800 G = 0.8 KG
G = 10 M / S²
DIT, FON PULLEY PERMANENT & PULLEY MOVE
A. PULLEY PERMANENT B. PULLEY
MOVE
ANSWER: W / F = 1 ANSWER: W / F =
2
MG/ F = 1 MG / F = 2
F = 0.8 X 10/1 F = 0.8 X 10/2
F = 8 N F = 4 N
19. C. SYSTEM PULLEY THAT IS COMPOUND BETWEEN PULLEY
PERMANENT AND PULLEY MOVE THAT ARRANGED IN ONE
FRAMEWORK AND SHAPE PULLEY BEAM OR CALLED
TACKLE
PULLEY THAT BE USED AMOUNT MORE FROM ONE
PROFIT MECHANICS ON SYSTEM PULLEY SAME WITH
AMOUNT ROPE THAT BE USED FOR INTERESTING LOAD OR
SAME WITH MANY PULLEY THAT BE USED ,
MAGNITUDE STYLE MINIMUM FOR RAISE LOAD IS:
KM = W / F = LF / LW = N
N = AMOUNT PULLEY
20. EXAMPLE QUETION
A object that displacement 1200 N when tied with pulley
compound compound 4 pulley, count big style minimum
must be given for interesting load mentioned,
Is known W = 1200 N. Km = n = 4
asked F =?
answer: Km = W / F
F = W / Km
= 1200/4
= 300 N
21. FIELD TILT
For simplify and move object from the place that low to the
place that more high
Information:
F = style power
W = weight object
s = long field tilt
h = high field tilt
The equation is: W xh = F xs
Big profit mekaniknya is:
Km = W / F = s / h
22. SOME TOOL THAT WAY IT
WORKS USE PRINCIPLE FIELD
TILT IS :
23. EXAMPLE QUESTION
What big business that do a that interesting object
weighing 40 N on field tilt mentioned
Is known W = 40 N asked F =?
s = 2m
h = 1 m
answer: W xh = F xs Km = 40/20 = 2
40 x 1 = F x 2
F = 40/2 = 20 N
